DONUM VITAE

DONUM VITAE
Instruction on Respect for Human Life in Its Origin and
on the Dignity of Procreation Replies to Certain Questions of the Day
22 February 1987
FOREWORD
The Congregation for the Doctrine of the Faith has been approached by various Episcopal
Conferences or individual Bishops, by theologians, doctors and scientists, concerning biomedical
techniques which make it possible to intervene in the initial phase of the life of a human being and in
the very processes of procreation and their conformity with the principles of Catholic morality. The
present Instruction, which is the result of wide consultation and in particular of a careful evaluation of
the declarations made by Episcopates, does not intend to repeat all the Church’s teaching on the
dignity of human life as it originates and on procreation, but to offer, in the light of the previous
teaching of the Magisterium, some specific replies to the main questions being asked in this regard.
The exposition is arranged as follows: an introduction will recall the fundamental principles, of an
anthropological and moral character, which are necessary for a proper evaluation of the problems and
for working out replies to those questions; the first part will have as its subject respect for the human
being from the first moment of his or her existence; the second part will deal with the moral questions
raised by technical interventions on human procreation; the third part will offer some orientations on
the relationships between moral law and civil law in terms of the respect due to human embryos and
foetuses* and as regards the legitimacy of techniques of artificial procreation.

  • The terms “zygote”, “pre-embryo”, “embryo” and “foetus” can indicate in the vocabulary of biology
    successive stages of the development of a human being. The present Instruction makes free use of these
    terms, attributing to them an identical ethical relevance, in order to designate the result (whether visible
    or not) of human generation, from the first moment of its existence until birth. The reason for this usage
    is clarified by the text (cf I, 1).
    INTRODUCTION
  1. BIOMEDICAL RESEARCH AND THE TEACHING
    OF THE CHURCH
    The gift of life which God the Creator and Father has entrusted to man calls him to appreciate the
    inestimable value of what he has been given and to take responsibility for it: this fundamental principle
    must be placed at the centre of one’s reflection in order to clarify and solve the moral problems raised
    by artificial interventions on life as it originates and on the processes of procreation. Thanks to the
    progress of the biological and medical sciences, man has at his disposal ever more effective therapeutic
    resources; but he can also acquire new powers, with unforeseeable consequences, over human life at its
    very beginning and in its first stages. Various procedures now make it possible to intervene not only in
    order to assist but also to dominate the processes of procreation. These techniques can enable man to
    “take in hand his own destiny”, but they also expose him “to the temptation to go beyond the limits of a
    reasonable dominion over nature”.(1) They might constitute progress in the service of man, but they
    also involve serious risks. Many people are therefore expressing an urgent appeal that in interventions
    on procreation the values and rights of the human person be safeguarded. Requests for clarification and
    guidance are coming not only from the faithful but also from those who recognize the Church as “an
    expert in humanity ” (2) with a mission to serve the “civilization of love” (3) and of life.
    The Church’s Magisterium does not intervene on the basis of a particular competence in the area of the
    experimental sciences; but having taken account of the data of research and technology, it intends to
    put forward, by virtue of its evangelical mission and apostolic duty, the moral teaching corresponding
    to the dignity of the person and to his or her integral vocation. It intends to do so by expounding the
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    criteria of moral judgment as regards the applications of scientific research and technology, especially
    in relation to human life and its beginnings. These criteria are the respect, defence and promotion of
    man, his “primary and fundamental right” to life,(4) his dignity as a person who is endowed with a
    spiritual soul and with moral responsibility (5) and who is called to beatific communion with God. The
    Church’s intervention in this field is inspired also by the Love which she owes to man, helping him to
    recognize and respect his rights and duties. This love draws from the fount of Christ’s love: as she
    contemplates the mystery of the Incarnate Word, the Church also comes to understand the “mystery of
    man”; (6) by proclaiming the Gospel of salvation, she reveals to man his dignity and invites him to
    discover fully the truth of his own being. Thus the Church once more puts forward the divine law in
    order to accomplish the work of truth and liberation. For it is out of goodness – in order to indicate the
    path of life – that God gives human beings his commandments and the grace to observe them: and it is
    likewise out of goodness – in order to help them persevere along the same path – that God always offers
    to everyone his forgiveness. Christ has compassion on our weaknesses: he is our Creator and
    Redeemer. May his spirit open men’s hearts to the gift of God’s peace and to an understanding of his
    precepts.
  2. SCIENCE AND TECHNOLOGY
    AT THE SERVICE OF THE HUMAN PERSON
    God created man in his own image and likeness: “male and female he created them” (Gen 1: 27 ),
    entrusting to them the task of “having dominion over the earth” (Gen 1:28). Basic scientific research
    and applied research constitute a significant expression of this dominion of man over creation. Science
    and technology are valuable resources for man when placed at his service and when they promote his
    integral development for the benefit of all; but they cannot of themselves show the meaning of
    existence and of human progress. Being ordered to man, who initiates and develops them, they draw
    from the person and his moral values the indication of their purpose and the awareness of their limits.
    It would on the one hand be illusory to claim that scientific research and its applications are morally
    neutral; on the other hand one cannot derive criteria for guidance from mere technical efficiency, from
    research’s possible usefulness to some at the expense of others, or, worse still, from prevailing
    ideologies. Thus science and technology require, for their own intrinsic meaning, an unconditional
    respect for the fundamental criteria of the moral law: that is to say, they must be at the service of the
    human person, of his inalienable rights and his true and integral good according to the design and will
    of God.(7) The rapid development of technological discoveries gives greater urgency to this need to
    respect the criteria just mentioned: science without conscience can only lead to man’s ruin. “Our era
    needs such wisdom more than bygone ages if the discoveries made by man are to be further humanized.
    For the future of the world stands in peril unless wiser people are forthcoming”.(8)
  3. ANTHROPOLOGY AND PROCEDURES
    IN THE BIOMEDICAL FIELD
    Which moral criteria must be applied in order to clarify the problems posed today in the field of
    biomedicine? The answer to this question presupposes a proper idea of the nature of the human person
    in his bodily dimension.
    For it is only in keeping with his true nature that the human person can achieve self-realization as a
    “unified totality”:(9) and this nature is at the same time corporal and spiritual. By virtue of its
    substantial union with a spiritual soul, the human body cannot be considered as a mere complex of
    tissues, organs and functions, nor can it be evaluated in the same way as the body of animals; rather it
    is a constitutive part of the person who manifests and expresses himself through it. The natural moral
    law expresses and lays down the purposes, rights and duties which are based upon the bodily and
    spiritual nature of the human person. Therefore this law cannot be thought of as simply a set of norms
    on the biological level; rather it must be defined as the rational order whereby man is called by the
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    Creator to direct and regulate his life and actions and in particular to make use of his own body.(10) A
    first consequence can be deduced from these principles: an intervention on the human body affects not
    only the tissues, the organs and their functions but also involves the person himself on different levels.
    It involves, therefore, perhaps in an implicit but nonetheless real way, a moral significance and
    responsibility. Pope John Paul II forcefully reaffirmed this to the World Medical Association when he
    said: “Each human person, in his absolutely unique singularity, is constituted not only by his spirit, but
    by his body as well. Thus, in the body and through the body, one touches the person himself in his
    concrete reality. To respect the dignity of man consequently amounts to safeguarding this identity of
    the man ‘corpore et anima unus’, as the Second Vatican Council says (Gaudium et Spes, 14, par.1). It is
    on the basis of this anthropological vision that one is to find the fundamental criteria for decisionmaking in the case of procedures which are not strictly therapeutic, as, for example, those aimed at the
    improvement of the human biological condition”.(11)
    Applied biology and medicine work together for the integral good of human life when they come to the
    aid of a person stricken by illness and infirmity and when they respect his or her dignity as a creature of
    God. No biologist or doctor can reasonably claim, by virtue of his scientific competence, to be able to
    decide on people’s origin and destiny. This norm must be applied in a particular way in the field of
    sexuality and procreation, in which man and woman actualize the fundamental values of love and life.
    God, who is love and life, has inscribed in man and woman the vocation to share in a special way in his
    mystery of personal communion and in his work as Creator and Father.(12) For this reason marriage
    possesses specific goods and values in its union and in procreation which cannot be likened to those
    existing in lower forms of life. Such values and meanings are of the personal order and determine from
    the moral point of view the meaning and limits of artificial interventions on procreation and on the
    origin of human life. These interventions are not to be rejected on the grounds that they are artificial.
    As such, they bear witness to the possibilities of the art of medicine. But they must be given a moral
    evaluation in reference to the dignity of the human person, who is called to realize his vocation from
    God to the gift of love and the gift of life.
  4. FUNDAMENTAL CRITERIA FOR A MORAL JUDGMENT
    The fundamental values connected with the techniques of artificial human procreation are two: the life
    of the human being called into existence and the special nature of the transmission of human life in
    marriage. The moral judgment on such methods of artificial procreation must therefore be formulated
    in reference to these values.
    Physical life, with which the course of human life in the world begins, certainly does not itself contain
    the whole of a person’s value, nor does it represent the supreme good of man who is called to eternal
    life. However it does constitute in a certain way the “fundamental ” value of life, precisely because
    upon this physical life all the other values of the person are based and developed.(13) The inviolability
    of the innocent human being’s right to life “from the moment of conception until death” (14) is a sign
    and requirement of the very inviolability of the person to whom the Creator has given the gift of life.
    By comparison with the transmission of other forms of life in the universe, the transmission of human
    life has a special character of its own, which derives from the special nature of the human person. “The
    transmission of human life is entrusted by nature to a personal and conscious act and as such is subject
    to the all-holy laws of God: immutable and inviolable laws which must be recognized and observed.
    For this reason one cannot use means and follow methods which could be licit in the transmission of
    the life of plants and animals” (15)
    Advances in technology have now made it possible to procreate apart from sexual relations through the
    meeting in vitro of the germ-cells previously taken from the man and the woman. But what is
    technically possible is not for that very reason morally admissible. Rational reflection on the
    fundamental values of life and of human procreation is therefore indispensable for formulating a moral
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    evaluation of such technological interventions on a human being from the first stages of his
    development.
  5. TEACHINGS OF THE MAGISTERIUM
    On its part, the Magisterium of the Church offers to human reason in this field too the light of
    Revelation: the doctrine concerning man taught by the Magisterium contains many elements which
    throw light on the problems being faced here. From the moment of conception, the life of every human
    being is to be respected in an absolute way because man is the only creature on earth that God has
    “wished for himself ” (16) and the spiritual soul of each man is “immediately created” by God; (17) his
    whole being bears the image of the Creator. Human life is sacred because from its beginning it involves
    “the creative action of God” (18) and it remains forever in a special relationship with she Creator, who
    is its sole end.(19) God alone is the Lord of life from its beginning until its end: no one can, in any
    circumstance, claim for himself the right to destroy directly an innocent human being. (20) Human
    procreation requires on the part of the spouses responsible collaboration with the fruitful love of God;
    (21) the gift of human life must be actualized in marriage through the specific and exclusive acts of
    husband and wife, in accordance with the laws inscribed in their persons and in their union.(22)
    I RESPECT FOR HUMAN EMBRYOS
    Careful reflection on this teaching of the Magisterium and on the evidence of reason, as mentioned
    above, enables us to respond to the numerous moral problems posed by technical interventions upon
    the human being in the first phases of his life and upon the processes of his conception.
  6. WHAT RESPECT IS DUE TO THE HUMAN EMBRYO, TAKING INTO ACCOUNT HIS
    NATURE AND IDENTITY?
    The human being must be respected – as a person – from the very first instant of his existence. The
    implementation of procedures of artificial fertilization has made possible various interventions upon
    embryos and human foetuses. The aims pursued are of various kinds: diagnostic and therapeutic,
    scientific and commercial. From all of this, serious problems arise. Can one speak of a right to
    experimentation upon human embryos for the purpose of scientific research? What norms or laws
    should be worked out with regard to this matter? The response to these problems presupposes a detailed
    reflection on the nature and specific identity – the word “status” is used – of the human embryo itself .
    At the Second Vatican Council, the Church for her part presented once again to modern man her
    constant and certain doctrine according to which: “Life once conceived, must be protected with the
    utmost care; abortion and infanticide are abominable crimes”. (23) More recently, the Charter of the
    Rights of the Family, published by the Holy See, confirmed that “Human life must be absolutely
    respected and protected from the moment of conception”.(24)
    This Congregation is aware of the current debates concerning the beginning of human life, concerning
    the individuality of the human being and concerning the identity of the human person. The
    Congregation recalls the teachings found in the Declaration on Procured Abortion: “From the time that
    the ovum is fertilized, a new life is begun which is neither that of the father nor of the mother; it is
    rather the life of a new human being with his own growth. It would never be made human if it were not
    human already. To this perpetual evidence … modern genetic science brings valuable confirmation. It
    has demonstrated that, from the first instant, the programme is fixed as to what this living being will be:
    a man, this individual-man with his characteristic aspects already well determined. Right from
    fertilization is begun the adventure of a human life, and each of its great capacities requires time … to
    find its place and to be in a position to act”. (25) This teaching remains valid and is further confirmed,
    if confirmation were needed, by recent findings of human biological science which recognize that in
    the zygote* resulting from fertilization the biological identity of a new human individual is already
    constituted. Certainly no experimental datum can be in itself sufficient to bring us to the recognition of
    a spiritual soul; nevertheless, the conclusions of science regarding the human embryo provide a
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    valuable indication for discerning by the use of reason a personal presence at the moment of this first
    appearance of a human life: how could a human individual not be a human person? The Magisterium
    has not expressly committed itself to an affirmation of a philosophical nature, but it constantly
    reaffirms the moral condemnation of any kind of procured abortion. This teaching has not been
    changed and is unchangeable.(26)
    Thus the fruit of human generation, from the first moment of its existence, that is to say from the
    moment the zygote has formed, demands the unconditional respect that is morally due to the human
    being in his bodily and spiritual totality. The human being is to be respected and treated as a person
    from the moment of conception; and therefore from that same moment his rights as a person must be
    recognized, among which in the first place is the inviolable right of every innocent human being to life.
    This doctrinal reminder provides the fundamental criterion for the solution of the various problems
    posed by the development of the biomedical sciences in this field: since the embryo must be treated as
    a person, it must also be defended in its integrity, tended and cared for, to the extent possible, in the
    same way as any other human being as far as medical assistance is concerned.
  • The zygote is the cell produced when the nuclei of the two gametes have fused.
  1. IS PRENATAL DIAGNOSIS MORALLY LICIT?
    If prenatal diagnosis respects the life and integrity of the embryo and the human foetus and is directed
    towards its safeguarding or healing as an individual, then the answer is affirmative.
    For prenatal diagnosis makes it possible to know the condition of the embryo and of the foetus when
    still in the mother’s womb. It permits, or makes it possible to anticipate earlier and more effectively,
    certain therapeutic, medical or surgical procedures. Such diagnosis is permissible, with the consent of
    the parents after they have been adequately informed, if the methods employed safeguard the life and
    integrity of the embryo and the mother, without subjecting them to disproportionate risks.(27) But this
    diagnosis is gravely opposed to the moral law when it is done with the thought of possibly inducing an
    abortion depending upon the results: a diagnosis which shows the existence of a malformation or a
    hereditary illness must not be the equivalent of a death-sentence. Thus a woman would be committing a
    gravely illicit act if she were to request such a diagnosis with the deliberate intention of having an
    abortion should the results conf rm the existence of a malformation or abnormality. The spouse or
    relatives or anyone else would similarly be acting in a manner contrary to the moral law if they were to
    counsel or impose such a diagnostic procedure on the expectant mother with the same intention of
    possibly proceeding to an abortion. So too the specialist would be guilty of illicit collaboration if, in
    conducting the diagnosis and in communicating its results, he were deliberately to contribute to
    establishing or favouring a link between prenatal diagnosis and abortion. In conclusion, any directive or
    programme of the civil and health authorities or of scientific organizations which in any way were to
    favour a link between prenatal diagnosis and abortion, or which were to go as far as directly to induce
    expectant mothers to submit to prenatal diagnosis planned for the purpose of eliminating foetuses
    which are affected by malformations or which are carriers of hereditary illness, is to be condemned as a
    violation of the unborn child’s right to life and as an abuse of the prior rights and duties of the spouses,
  2. ARE THERAPEUTIC PROCEDURES CARRIED OUT ON THE HUMAN EMBRYO LICIT?
    As with all medical interventions on patients, one must uphold as licit procedures carried out on the
    human embryo which respect the life and integrity of the embryo and do not involve disproportionate
    risks for it but are directed towards its healing, the improvement of its condition of health, or its
    individual survival. Whatever the type of medical, surgical or other therapy, the free and informed
    consent of the parents is required, according to the deontological rules followed in the case of children.
    The application of this moral principle may call for delicate and particular precautions in the case of
    embryonic or foetal life. The legitimacy and criteria of such procedures have been clearly stated by
    Pope John Paul II: “A strictly therapeutic intervention whose explicit objective is the healing of various
    maladies such as those stemming from chromosomal defects will, in principle, be considered desirable,
    provided it is directed to the true promotion of the personal well-being of the individual without doing
    6
    harm to his integrity or worsening his conditions of life. Such an intervention would indeed fall within
    the logic of the Christian moral tradition” (28)
  3. HOW IS ONE TO EVALUATE MORALLY RESEARCH AND EXPERIMENTATION* ON
    HUMAN EMBRYOS AND FOETUSES?
    Medical research must refrain from operations on live embryos, unless there is a moral certainty of not
    causing harm to the life or integrity of the unborn child and the mother, and on condition that the
    parents have givers their free and in formed consent to the procedure. It follows that all research, even
    when limited to the simple observation of the embryo, would become illicit were it to involve risk to
    the embryo’s physical integrity or life by reason of the methods used or the effects induced. As regards
    experimentation, and presupposing the general distinction between experi;’nentation for purposes
    which are not directly therapeutic and experimentation which is clearly therapeutic for the subject
    himself, in the case in point one must also distinguish between experimentation carried out on embryos
    which are still alive and experimentation carried out on embryos which are dead. If the embryos are
    living, whether viable or not, they must be respected just like any other human person; experimentation
    on embryos which is not directly therapeutic is illicit.(29) No objective, even though noble in itself,
    such as a foreseeable advantage to science, to other human beings or to society, can in any way justify
    experimentation on living human embryos or foetuses, whether viable or not, either inside or outside
    the mother’s womb. The informed consent ordinarily required for clinical experimentation on adults
    cannot be granted by the parents, who may not freely dispose of the physical integrity or life of the
    unborn child. Moreover, experimentation on embryos and foetuses always involves risk, and indeed in
    most cases it involves the certain expectation of harm to their physical integrity or even their death. To
    use human embryos or foetuses as the object or instrument of experimentation constitutes a crime
    against their dignity as human beings having a right to the same respect that is due to the child already
    born and to every human person.
    The Charter of the Rights of the Family published by the Holy See affirms: “Respect for the dignity of
    the human being excludes all experimental manipulation or exploitation of the human embryo”.(30)
    The practice of keeping alive human embryos in vivo or in vitro for experimental or commercial
    purposes is totally opposed to human dignity. In the case of experimentation that is clearly therapeutic,
    namely, when it is a matter of experimental forms of therapy used for the benefit of the embryo itself in
    a final attempt to save its life, and in the absence of other reliable forms of therapy, recourse to drugs or
    procedures not yet fully tested can be licit (31)
    The corpses of human embryos and foetuses, whether they have been deliberately aborted or not, must
    be respected just as the remains of other human beings. In particular, they cannot be subjected to
    mutilation or to autopsies if their death has not yet been verified and without the consent of the parents
    or of the mother. Furthermore, the moral requirements must be safeguarded that there be no complicity
    in deliberate abortion and that the risk of scandal be avoided. Also, in the case of dead foetuses, as for
    the corpses of adult persons, all commercial trafficking must be considered illicit and should be
    prohibited.
  • Since the terms “research” and “experimentation” are often used equivalently and ambiguously, it is
    deemed necessary to specify the exact meaning given them in this document.
    1) By research is meant any inductive-deductive process which aims at promoting the systematic
    observation of a given phenomenon in the human field or at verifying a hypothesis arising from
    previous observations.
    2) By experimentation is meant any research in which the human being (in the various stages of his
    existence: embryo, foetus, child or adult) represents the object through which or upon which one
    intends to verify the effect, at present unknown or not sufficiently known, of a given treatment (e.g.
    pharmacological, teratogenic, surgical, etc.).
  1. HOW IS ONE TO EVALUATE MORALLY THE USE FOR RESEARCH PURPOSES OF
    EMBRYOS OBTAINED BY FERTILIZATION ‘IN VITRO’?
    7
    Human embryos obtained in vitro are human beings and subjects with rights: their dignity and right to
    life must be respected from the first moment of their existence. It is immoral to produce human
    embryos destined to be exploited as disposable “biological material”. In the usual practice of in vitro
    fertilization, not all of the embryos are transferred to the woman’s body; some are destroyed. Just as the
    Church condemns induced abortion, so she also forbids acts against the life of these human beings. It is
    a duty to condemn the particular gravity of the voluntary destruction of human embryos obtained ‘in
    vitro’ for the sole purpose of research, either by means of artificial insemination of by means of “twin
    fission”. By acting in this way the researcher usurps the place of God; and, even though he may be
    unaware of this, he sets himself up as the master of the destiny of others inasmuch as he arbitrarily
    chooses whom he will allow to live and whom he will send to death and kills defenceless human
    beings.
    Methods of observation or experimentation which damage or impose grave and disproportionate risks
    upon embryos obtained in vitro are morally illicit for the same reasons. every human being is to be
    respected for himself, and cannot be reduced in worth to a pure and simple instrument for the
    advantage of others. It is therefore not in conformity with the moral law deliberately to expose to death
    human embryos obtained ‘in vitro’. In consequence of the fact that they have been produced in vitro,
    those embryos which art not transferred into the body of the mother and are called “spare” are exposed
    to an absurd fate, with no possibility of their being offered safe means of survival which can be licitly
    pursued.
  2. WHAT JUDGMENT SHOULD BE MADE ON OTHER PROCEDURES OF MANIPULATING
    EMBRYOS CONNECTED WITH THE “TECHNIQUES OF HUMAN REPRODUCTION”?
    Techniques of fertilization in vitro can open the way to other forms of biological and genetic
    manipulation of human embryos, such as attempts or plans for fertilization between human and animal
    gametes and the gestation of human embryos in the uterus of animals, or the hypothesis or project of
    constructing artificial uteruses for the human embryo. These procedures are contrary to the human
    dignity proper to the embryo, and at the same time they are contrary to the right of every person to be
    conceived and to be born within marriage and from marriage.(32) Also, attempts or hypotheses for
    obtaining a human being without any connection with sexuality through “twin fission”, cloning or
    parthenogenesis are to be considered contrary to the moral law, since they are in opposition to the
    dignity both of human procreation and of the conjugal union.
    The freezing of embryos, even when carried out in order to preserve the life of an embryo –
    cryopreservation – constitutes an offence against the respect due to human beings by exposing them to
    grave risks of death or harm to their physical integrity and depriving them, at least temporarily, of
    maternal shelter and gestation, thus placing them in a situation in which further offences and
    manipulation are possible.
    Certain attempts to influence chromosomic or genetic inheritance are not therapeutic but are aimed at
    producing human beings selected according to sex or other predetermined qualities. These
    manipulations are contrary to the personal dignity of the human being and his or her integrity and
    identity. Therefore in no way can they be justified on the grounds of possible beneficial consequences
    for future humanity. (33) Every person must be respected for himself: in this consists the dignity and
    right of every human being from his or her beginning.
    II INTERVENTIONS UPON HUMAN PROCREATION
    By “artificial procreation” or ” artificial fertilization” are understood here the different technical
    procedures directed towards obtaining a human conception in a manner other than the sexual union of
    man and woman. This Instruction deals with fertilization of an ovum in a test-tube (in vitro
    fertilization) and artificial insemination through transfer into the woman’s genital tracts of previously
    collected sperm.
    8
    A preliminary point for the moral evaluation of such technical procedures is constituted by the
    consideration of the circumstances and consequences which those procedures involve in relation to the
    respect due the human embryo. Development of the practice of in vitro fertilization has required
    innumerable fertilizations and destructions of human embryos. Even today, the usual practice
    presupposes a hyperovulation on the part of the woman: a number of ova are withdrawn, fertilized and
    then cultivated in vitro for some days. Usually not all are transferred into the genital tracts of the
    woman; some embryos, generally called “spare “, are destroyed or frozen. On occasion, some of the
    implanted embryos are sacrificed for various eugenic, economic or psychological reasons. Such
    deliberate destruction of human beings or their utilization for different purposes to the detriment of
    their integrity and life is contrary to the doctrine on procured abortion already recalled. The connection
    between in vitro fertilization and the voluntary destruction of human embryos occurs too often. This is
    significant: through these procedures, with apparently contrary purposes, life and death are subjected to
    the decision of man, who thus sets himself up as the giver of life and death by decree. This dynamic of
    violence and domination may remain unnoticed by those very individuals who, in wishing to utilize this
    procedure, become subject to it themselves. The facts recorded and the cold logic which links them
    must be taken into consideration for a moral judgment on IVF and ET (in vitro fertilization and embryo
    transfer): the abortion-mentality which has made this procedure possible thus leads, whether one wants
    it or not, to man’s domination over the life and death of his fellow human beings and can lead to a
    system of radical eugenics.
    Nevertheless, such abuses do not exempt one from a further and thorough ethical study of the
    techniques of artificial procreation considered in themselves, abstracting as far as possible from the
    destruction of embryos produced in vitro. The present Instruction will therefore take into consideration
    in the first place the problems posed by heterologous artificial fertilization (II, 1-3), * and subsequently
    those linked with homologous artificial fertilization (II, 4-6 ) .** Before formulating an ethical
    judgment on each of these procedures, the principles and values which determine the moral evaluation
    of each of them will be considered.
  • By the term heterologous artificial fertilization or procreation, the Instruction means techniques used
    to obtain a human conception artificially by the use of gametes coming from at least one donor other
    than the spouses who are joined in marriage. Such techniques can be of two types
    a) Heterologous IVF and ET: the technique used to obtain a human conception through the meeting in
    vitro of gametes taken from at least one donor other than the two spouses joined in marriage.
    b) Heterologous artifical insemination: the technique used to obtain a human conception through the
    transfer into the genital tracts of the woman of the sperm previously collected from a donor other than
    the husband.
    ** By artificial homologous fertilization or procreation, the Instruction means the technique used to
    obtain a human conception using the gametes of the two spouses joined in marriage. Homologous
    artificial fertilization can be carried out by two different methods:
    a) Homologous IVF and ET: the technique used to obtain a human conception through the meeting in
    vitro of the gametes of the spouses joined in marriage.
    b) Homologous artificial insemination: the technique used to obtain a human conception through the
    transfer into the genital tracts of a married woman of the sperm previously collected from her husband.
    A. HETEROLOGOUS ARTIFICIAL FERTILIZATION
  1. WHY MUST HUMAN PROCREATION TAKE PLACE IN MARRIAGE?
    Every human being is always to be accepted as a gift and blessing of God. However, from the moral
    point of view a truly responsible procreation vis-à-vis the unborn child must be the fruit of marriage.
    For human procreation has specific characteristics by virtue of the personal dignity of the parents and
    of the children: the procreation of a new person, whereby the man and the woman collaborate with the
    power of the Creator, must be the fruit and the sign of the mutual self-giving of the spouses, of their
    9
    love and of their fidelity.(34) The fidelity of the spouses in the unity of marriage involves reciprocal
    respect of their right to become a father and a mother only through each other. The child has the right
    to be conceived, carried in the womb, brought into the world and brought up within marriage: it is
    through the secure and recognized relationship to his own parents that the child can discover his own
    identity and achieve his own proper human development. The parents find in their child a confirmation
    and completion of their reciprocal self-giving: the child is the living image of their love, the permanent
    sign of their conjugal union, the living and indissoluble concrete expression of their paternity and
    maternity, (35) By reason of the vocation and social responsibilities of the person, the good of the
    children and of the parents contributes to the good of civil society; the vitality and stability of society
    require that children come into the world within a family and that the family be firmly based on
    marriage. The tradition of the Church and anthropological reflection recognize in marriage and in its
    indissoluble unity the only setting worthy of truly responsible procreation.
  2. DOES HETEROLOGOUS ARTIFICIAL FERTILIZATION CONFORM TO THE DIGNITY OF
    THE COUPLE AND TO THE TRUTH OF MARRIAGE?
    Through IVF and ET and heterologous artificial insemination, human conception is achieved through
    the fusion of gametes of at least one donor other than the spouses who are united in marriage.
    Heterologous artificial fertilization is contrary to the unity of marriage, to the dignity of the spouses, to
    the vocation proper to parents, and to the child’s right to be conceived and brought into the world in
    marriage and from marriage.(36) Respect for the unity of marriage and for conjugal fidelity demands
    that the child be conceived in marriage; the bond existing between husband and wife accords the
    spouses, in an objective and inalienable manner, the exclusive right to become father and mother solely
    through each other.(37) Recourse to the gametes of a third person, in order to have sperm or ovum
    available, constitutes a violation of the reciprocal commitment of the spouses and a grave lack in regard
    to that essential property of marriage which is its unity. Heterologous artificial fertilization violates the
    rights of the child; it deprives him of his filial relationship with his parental origins and can hinder the
    maturing of his personal identity. Furthermore, it offends the common vocation of the spouses who are
    called to fatherhood and motherhood: it objectively deprives conjugal fruitfulness of its unity and
    integrity; it brings about and manifests a rupture between genetic parenthood, gestational parenthood
    and responsibility for upbringing. Such damage to the personal relationships within the family has
    repercussions on civil society: what threatens the unity and stability of the family is a source of
    dissension, disorder and injustice in the whole of social life. These reasons lead to a negative moral
    judgment concerning heterologous artificial fertilization: consequently fertilization of a married woman
    with the sperm of a donor different from her husband and fertilization with the husband’s sperm of an
    ovum not coming from his wife are morally illicit. Furthermore, the artificial fertilization of a woman
    who is unmarried or a widow, whoever the donor may be, cannot be morally justified.
    The desire to have a child and the love between spouses who long to obviate a sterility which cannot be
    overcome in any other way constitute understandable motivations; but subjectively good intentions do
    not render heterologous artificial fertilization conformable to the objective and inalienable properties of
    marriage or respectful of the rights of the child and of the spouses.
  3. IS “SURROGATE”* MOTHERHOOD MORALLY LICIT?
    No, for the same reasons which lead one to reject heterologous artificial fertilization: for it is contrary
    to the unity of marriage and to the dignity of the procreation of the human person. Surrogate
    motherhood represents an objective failure to meet the obligations of maternal love, of conjugal fidelity
    and of responsible motherhood; it offends the dignity and the right of the child to be conceived, carried
    in the womb, brought into the world and brought up by his own parents; it sets up, to the detriment of
    families, a division between the physical, psychological and moral elements which constitute those
    families.
  • By “surrogate mother” the Instruction means:
    10
    a) the woman who carries in pregnancy an embryo implanted in her uterus and who is genetically a
    stranger to the embryo because it has been obtained through the union of the gametes of “donors”. She
    carries the pregnancy with a pledge to surrender the baby once it is born to the party who
    commissioned or made the agreement for the pregnancy.
    b) the woman who carries in pregnancy an embryo to whose procreation she has contributed the
    donation of her own ovum, fertilized through insemination with the sperm of a man other than her
    husband. She carries the pregnancy with a pledge to surrender the child once it is born to the party who
    commissioned or made the agreement for the pregnancy.
    B HOMOLOGOUS ARTIFICIAL FERTILIZATION
    Since heterologous artificial fertilization has been declared unacceptable, the question arises of how to
    evaluate morally the process of homologous artificial fertilization: IVF and ET and artificial
    insemination between husband and wife. First a question of principle must be clarified.
  1. WHAT CONNECTION IS REQUIRED FROM THE MORAL POINT OF VIEW BETWEEN
    PROCREATION AND THE CONJUGAL ACT?
    a) The Church’s teaching on marriage and human procreation affirms the “inseparable connection,
    willed by God and unable to be broken by man on his own initiative, between the two meanings of the
    conjugal act: the unitive meaning and the procreative meaning. Indeed, by its intimate structure, the
    conjugal act, while most closely uniting husband and wife, capacitates them for the generation of new
    lives, according to laws inscribed in the very being of man and of woman”.(38) This principle, which is
    based upon the nature of marriage and the intimate connection of the goods of marriage, has wellknown consequences on the level of responsible fatherhood and motherhood. “By safeguarding both
    these essential aspects, the unitive and the procreative, the conjugal act preserves in its fullness the
    sense of true mutual love and its ordination towards man’s exalted vocation to parenthood”.(39) The
    same doctrine concerning the link between the meanings of the conjugal act and between the goods of
    marriage throws light on the moral problem of homologous artificial fertilization, since “it is never
    permitted to separate these different aspects to such a degree as positively to exclude either the
    procreative intention or the conjugal relation” (40) Contraception deliberately deprives the conjugal act
    of its openness to procreation and in this way brings about a voluntary dissociation of the ends of
    marriage. Homologous artificial fertilization, in seeking a procreation which is not the fruit of a
    specific act of conjugal union, objectively effects an analogous separation between the goods and the
    meanings of marriage. Thus, fertilization is licitly sought when it is the result of a “conjugal act which
    is per se suitable for the generation of children to which marriage is ordered by its nature and by which
    the spouses become one flesh”.(41) But from the moral point of view procreation is deprived of its
    proper perfection when it is not desired as the fruit of the conjugal act, that is to say of the specific act
    of the spouses’ union.
    b ) The moral value of the intimate link between the goods of marriage and between the meanings of
    the conjugal act is based upon the unity of the human being, a unity involving body and spiritual soul.
    (42) Spouses mutually express their personal love in the “language of the body “, which clearly
    involves both “sponsal meanings” and parental ones.(43) The conjugal act by which the couple
    mutually express their self-gift at the same time expresses openness to the gift of life. It is an act that is
    inseparably corporal and spiritual. It is in their bodies and through their bodies that the spouses
    consummate their marriage and are able to become father and mother. In order to respect the language
    of their bodies and their natural generosity, the conjugal union must take place with respect for its
    openness to procreation; and the procreation of a person must be the fruit and the result of married
    love. The origin of the human being thus follows from a procreation that is “linked to the union, not
    only biological but also spiritual, of the parents, made one by the bond of marriage”.(44) Fertilization
    achieved outside the bodies of the couple remains by this very fact deprived of the meanings and the
    values which are expressed in the language of the body and in the union of human persons.
    11
    c) Only respect for the link between the meanings of the conjugal act and respect for the unity of the
    human being make possible procreation in conformity with the dignity of the person. In his unique and
    irrepeatable origin, the child must be respected and recognized as equal in personal dignity to those
    who give him life. The human person must be accepted in his parents’ act of union and love; the
    generation of a child must therefore be the fruit of that mutual giving (45) which is realized in the
    conjugal act wherein the spouses cooperate as servants and not as masters in the work of the Creator
    who is Love. In reality, the origin of a human person is the result of an act of giving. The one
    conceived must be the fruit of his parents’ love. He cannot be desired or conceived as the product of an
    intervention of medical or biological techniques; that would be equivalent to reducing him to an object
    of scientific technology. No one may subject the coming of a child into the world to conditions of
    technical efficiency which are to be evaluated according to standards of control and dominion. The
    moral relevance of the link between the meanings of the conjugal act and between the goods of
    marriage, as well as the unity of the human being and the dignity of his origin, demand that the
    procreation of a human person be brought about as the fruit of the conjugal act specific to the love
    between spouses. The link between procreation and the conjugal act is thus shown to be of great
    importance on the anthropological and moral planes, and it throws light on the positions of the
    Magisterium with regard to homologous artificial fertilization.
  2. IS HOMOLOGOUS ‘IN VITRO’ FERTILIZATION MORALLY LICIT?
    The answer to this question is strictly dependent on the principles just mentioned. Certainly one cannot
    ignore the legitimate aspirations of sterile couples. For some, recourse to homologous IVF and ET
    appears to be the only way of fulfilling their sincere desire for a child. The question is asked whether
    the totality of conjugal life in such situations is not sufficient to ensure the dignity proper to human
    procreation. It is acknowledged that IVF and ET certainly cannot supply for the absence of sexual
    relations (47) and cannot be preferred to the specific acts of conjugal union, given the risks involved for
    the child and the difficulties of the procedure. But it is asked whether, when there is no other way of
    overcoming the sterility which is a source of suffering, homologous in vitro fertilization may not
    constitute an aid, if not a form of therapy, whereby its moral licitness could be admitted. The desire for
    a child – or at the very least an openness to the transmission of life – is a necessary prerequisite from the
    moral point of view for responsible human procreation. But this good intention is not sufficient for
    making a positive moral evaluation of in vitro fertilization between spouses. The process of IVF and
    ET must be judged in itself and cannot borrow its definitive moral quality from the totality of conjugal
    life of which it becomes part nor from the conjugal acts which may precede or follow it.(48)
    It has already been recalled that, in the circumstances in which it is regularly practised, IVF and ET
    involves the destruction of human beings, which is something contrary to the doctrine on the illicitness
    of abortion previously mentioned.(49) But even in a situation in which every precaution were taken to
    avoid the death of human embryos, homologous IVF and ET dissociates from the conjugal act the
    actions which are directed to human fertilization. For this reason the very nature of homologous IVF
    and ET also must be taken into account, even abstracting from the link with procured abortion.
    Homologous IVF and ET is brought about outside the bodies of the couple through actions of third
    parties whose competence and technical activity determine the success of the procedure. Such
    fertilization entrusts the life and identity of the embryo into the power of doctors and biologists and
    establishes the domination of technology over the origin and destiny of the human person. Such a
    relationship of domination is in itself contrary to the dignity and equality that must be common to
    parents and children.
    Conception in vitro is the result of the technical action which presides over fertilization. Such
    fertilization is neither in fact achieved nor positively willed as the expression and fruit of a specific act
    of the conjugal union. In homologous IVF and ET, therefore, even if it is considered in the context of
    ‘de facto’ existing sexual relations, the generation of the human person is objectively deprived of its
    proper perfection: namely, that of being the result and fruit of a conjugal act in which the spouses can
    12
    become “cooperators with God for giving life to a new person”.(50) These reasons enable us to
    understand why the act of conjugal love is considered in the teaching of the Church as the only setting
    worthy of human procreation. For the same reasons the so-called “simple case”, i.e. a homologous IVF
    and ET procedure that is free of any compromise with the abortive practice of destroying embryos and
    with masturbation, remains a technique which is morally illicit because it deprives human procreation
    of the dignity which is proper and connatural to it. Certainly, homologous IVF and ET fertilization is
    not marked by all that ethical negativity found in extra-conjugal procreation; the family and marriage
    continue to constitute the setting for the birth and upbringing of the children. Nevertheless, in
    conformity with the traditional doctrine relating to the goods of marriage and the dignity of the person,
    the Church remain opposed from the moral point of view to homologous ‘in vitro’ fertilization. Such
    fertilization is in itself illicit and in opposition to the dignity of procreation and of the conjugal union,
    even when everything is done to avoid the death of the human embryo. Although the manner in which
    human conception is achieved with IVF and ET cannot be approved, every child which comes into the
    world must in any case be accepted as a living gift of the divine Goodness and must be brought up with
    love.
  3. HOW IS HOMOLOGOUS ARTIFICIAL INSEMINATION TO BE EVALUATED FROM THE
    MORAL POINT OF VIEW?
    Homologous artificial insemination within marriage cannot be admitted except for those cases in which
    the technical means is not a substitute for the conjugal act but serves to facilitate and to help so that the
    act attains its natural purpose.
    The teaching of the Magisterium on this point has already been stated.(51) This teaching is not just an
    expression of particular historical circumstances but is based on the Church’s doctrine concerning the
    connection between the conjugal union and procreation and on a consideration of the personal nature of
    the conjugal act and of human procreation. “In its natural structure, the conjugal act is a personal
    action, a simultaneous and immediate cooperation on the part of the husband and wife, which by the
    very nature of the agents and the proper nature of the act is the expression of the mutual gift which,
    according to the words of Scripture, brings about union ‘in one flesh’ “.(52) Thus moral conscience
    “does not necessarily proscribe the use of certain artificial means destined solely either to the
    facilitating of the natural act or to ensuring that the natural act normally performed achieves its proper
    end”.(53) If the technical means facilitates the conjugal act or helps it to reach its natural objectives, it
    can be morally acceptable. If, on the other hand, the procedure were to replace the conjugal act, it is
    morally illicit. Artificial insemination as a substitute for the conjugal act is prohibited by reason of the
    voluntarily achieved dissociation of the two meanings of the conjugal act. Masturbation, through which
    the sperm is normally obtained, is another sign of this dissociation: even when it is done for the
    purpose of procreation, the act remains deprived of its unitive meaning: “It lacks the sexual relationship
    called for by the moral order, namely the relationship which realizes ‘the full sense of mutual selfgiving and human procreation in the context of true love’ “.(54)
  4. WHAT MORAL CRITERION CAN BE PROPOSED WITH REGARD TO MEDICAL
    INTERVENTION IN HUMAN PROCREATION?
    The medical act must be evaluated not only with reference to its technical dimension but also and
    above all in relation to its goal which is the good of persons and their bodily and psychological health.
    The moral criteria for medical intervention in procreation are deduced from the dignity of human
    persons, of their sexuality and of their origin. Medicine which seeks to be ordered to the integral good
    of the person must respect the specifically human values of sexuality.(55) The doctor is at the service
    of persons and of human procreation. He does not have the authority to dispose of them or to decide
    their fate.
    A medical intervention respects the dignity of persons when it seeks to assist the conjugal act either in
    order to facilitate its performance or in order to enable it to achieve its objective once it has been
    normally performed”,(56) On the other hand, it sometimes happens that a medical procedure
    13
    technologically replaces the conjugal act in order to obtain a procreation which is neither its result nor
    its fruit. In this case the medical act is not, as it should be, at the service of conjugal union but rather
    appropriates to itself the procreative function and thus contradicts the dignity and the inalienable rights
    of the spouses and of the child to be born. The humanization of medicine, which is insisted upon today
    by everyone, requires respect for the integral dignity of the human person first of all in the act and at
    the moment in which the spouses transmit life to a new person. It is only logical therefore to address an
    urgent appeal to Catholic doctors and scientists that they bear exemplary witness to the respect due to
    the human embryo and to the dignity of procreation. The medical and nursing staff of Catholic
    hospitals and clinics are in a special way urged to do justice to the moral obligations which they have
    assumed, frequently also, as part of their contract. Those who are in charge of Catholic hospitals and
    clinics and who are often Religious will take special care to safeguard and promote a diligent
    observance of the moral norms recalled in the present Instruction.
  5. THE SUFFERING CAUSED BY INFERTILITY IN MARRIAGE
    The suffering of spouses who cannot have children or who are afraid of bringing a handicapped child
    into the world is a suffering that everyone must understand and properly evaluate.
    On the part of the spouses, the desire for a child is natural: it expresses the vocation to fatherhood and
    motherhood inscribed in conjugal love. This desire can be even stronger if the couple is affected by
    sterility which appears incurable. Nevertheless, marriage does not confer upon the spouses the right to
    have a child, but only the right to perform those natural acts which are per se ordered to
    procreation.(57) A true and proper right to a child would be contrary to the child’s dignity and nature.
    The child is not an object to which one has a right, nor can he be considered as an object of ownership:
    rather, a child is a gift, “the supreme gift” (58) and the most gratuitous gift of marriage, and is a living
    testimony of the mutual giving of his parents. For this reason, the child has the right, as already
    mentioned, to be the fruit of the specific act of the conjugal love of his parents; and he also has the right
    to be respected as a person from the moment of his conception.
    Nevertheless, whatever its cause or prognosis, sterility is certainly a difficult trial. The community of
    believers is called to shed light upon and support the suffering of those who are unable to fulfill their
    legitimate aspiration to motherhood and fatherhood. Spouses who find themselves in this sad situation
    are called to find in it an opportunity for sharing in a particular way in the Lord’s Cross, the source of
    spiritual fruitfulness. Sterile couples must not forget that “even when procreation is not possible,
    conjugal life does not for this reason lose its value. Physical sterility in fact can be for spouses the
    occasion for other important services to the life of the human person, for example, adoption, various
    forms of educational work, and assistance to other families and to poor or handicapped children”.(59)
    Many researchers are engaged in the fight against sterility. While fully safeguarding the dignity of
    human procreation, some have achieved results which previously seemed unattainable. Scientists
    therefore are to be encouraged to continue their research with the aim of preventing the causes of
    sterility and of being able to remedy them so that sterile couples will be able to procreate in full respect
    for their own personal dignity and that of the child to be born.
    III. MORAL AND CIVIL LAW
    THE VALUES AND MORAL OBLIGATIONS
    THAT CIVIL LEGISLATION
    MUST RESPECT AND SANCTION IN THIS MATTER
    The inviolable right to life of every innocent human individual and the rights of the family and of the
    institution of marriage constitute fundamental moral values, because they concern the natural condition
    and integral vocation of the human person; at the same time they are constitutive elements of civil
    society and its order. For this reason the new technological possibilities which have opened up in the
    field of biomedicine require the intervention of the political authorities and of the legislator, since an
    uncontrolled application of such techniques could lead to unforeseeable and damaging consequences
    14
    for civil society. Recourse to the conscience of each individual and to the self-regulation of researchers
    cannot be sufficient for ensuring respect for personal rights and public order. If the legislator
    responsible for the common good were not watchful, he could be deprived of his prerogatives by
    researchers claiming to govern humanity in the name of the biological discoveries and the alleged
    “improvement” processes which they would draw from those discoveries. “Eugenism” and forms of
    discrimination between human beings could come to be legitimized: this would constitute an act of
    violence and a serious offense to the equality, dignity and fundamental rights of the human person. The
    intervention of the public authority must be inspired by the rational principles which regulate the
    relationships between civil law and moral law. The task of the civil law is to ensure the common good
    of people through the recognition of and the defence of fundamental rights and through the promotion
    of peace and of public morality.(60) In no sphere of life can the civil law take the place of conscience
    or dictate norms concerning things which are outside its competence. It must sometimes tolerate, for
    the sake of public order, things which it cannot forbid without a greater evil resulting. However, the
    inalienable rights of the person must be recognized and respected by civil society and the political
    authority. These human rights depend neither on single individuals nor on parents; nor do they
    represent a concession made by society and the State: they pertain to human nature and are inherent in
    the person by virtue of the creative act from which the person took his of her origin. Among such
    fundamental rights one should mention in this regard:
    a) every human being’s right to life and physical integrity from the moment of conception until death;
    b) the rights of the family and of marriage as an institution and, in this area, the child’s right to be
    conceived, brought into the world and brought up by his parents. To each of these two themes it is
    necessary here to give some further consideration.
    In various States certain laws have authorized the direct suppression of innocents: the moment a
    positive law deprives a category of human beings of the protection which civil legislation must accord
    them, the State is denying the equality of all before the law. When the State does not place its power at
    the service of the rights of each citizen, and in particular of the more vulnerable, the very foundations
    of a State based on law are undermined. The political authority consequently cannot give approval to
    the calling of human beings into existence through procedures which would expose them to those very
    grave risks noted previously. The possible recognition by positive law and the political authorities of
    techniques of artificial transmission of life and the experimentation connected with it would widen the
    breach already opened by the legalization of abortion. As a consequence of the respect and protection
    which must be ensured for the unborn child from the moment of his conception, the law must provide
    appropriate penal sanctions for every deliberate violation of the child’s rights. The law cannot tolerate –
    indeed it must expressly forbid – that human beings, even at the embryonic stage, should be treated as
    objects of experimentation, be mutilated or destroyed with the excuse that they are superfluous or
    incapable of developing normally.
    The political authority is bound to guarantee to the institution of the family, upon which society is
    based, the juridical protection to which it has a right. From the very fact that it is at the service of
    people, the political authority must also be at the service of the family. Civil law cannot grant approval
    to techniques of artificial procreation which, for the benefit of third parties (doctors, biologists,
    economic or governmental powers), take away what is a right inherent in the relationship between
    spouses; and therefore civil law cannot legalize the donation of gametes between persons who are not
    legitimately united in marriage. Legislation must also prohibit, by virtue of the support which is due to
    the family, embryo banks, post mortem insemination and “surrogate motherhood”. It is part of the duty
    of the public authority to ensure that the civil law is regulated according to the fundamental norms of
    the moral law in matters concerning human rights, human life and the institution of the family.
    Politicians must commit themselves, through their interventions upon public opinion, to securing in
    society the widest possible consensus on such essential points and to consolidating this consensus
    wherever it risks being weakened or is in danger of collapse.
    15
    In many countries, the legalization of abortion and juridical tolerance of unmarried couples makes it
    more difficult to secure respect for the fundamental rights recalled by this Instruction. It is to be hoped
    that States will not become responsible for aggravating these socially damaging situations of injustice.
    It is rather to be hoped that nations and States will realize all the cultural, ideological and political
    implications connected with the techniques of artificial procreation and will find the wisdom and
    courage necessary for issuing laws which are more just and more respectful of human life and the
    institution of the family. The civil legislation of many states confers an undue legitimation upon certain
    practices in the eyes of many today; it is seen to be incapable of guaranteeing that morality which is in
    conformity with the natural exigencies of the human person and with the “unwritten laws” etched by
    the Creator upon the human heart. All men of good will must commit themselves, particularly within
    their prof essional field and in the exercise of their civil rights, to ensuring the reform of morally
    unacceptable civil laws and the correction of illicit practices. In addition, “conscientious objection” visà-vis such laws must be supported and recognized. A movement of passive resistence to the
    legitimation of practices contrary to human life and dignity is beginning to make an ever sharper
    impression upon the moral conscience of many, especially among specialists in the biomedical
    sciences.
    CONCLUSION
    The spread of technologies of intervention in the processes of human procreation raises very serious
    moral problems in relation to the respect due to the human being from the moment of conception, to the
    dignity of the person, of his or her sexuality, and of the transmission of life. With this Instruction the
    Congregation for the Doctrine of the Faith, in fulfilling its responsibility to promote and defend the
    Church’s teaching in so serious a matter, addresses a new and heartfelt invitation to all those who, by
    reason of their role and their commitment, can exercise a positive influence and ensure that, in the
    family and in society, due respect is accorded to life and love. It addresses this invitation to those
    responsible for the formation of consciences and of public opinion, to scientists and medical
    professionals, to jurists and politicians. It hopes that all will understand the incompatibility between
    recognition of the dignity of the human person and contempt for life and love, between faith in the
    living God and the claim to decide arbitrarily the origin and fate of a human being.
    In particular, the Congregation for the Doctrine of the Faith addresses an invitation with confidence and
    encouragement to theologians, and above all to moralists, that they study more deeply and make eves
    more accessible to the faithful the contents of the teaching of the Church’s Magisterium in the light of a
    valid anthropology in the matter of sexuality and marriage and in the context of the necessary
    interdisciplinary approach. Thus they will make it possible to understand ever more clearly the reasons
    for and the validity of this teaching. By defending man against the excesses of his own power, the
    Church of God reminds him of the reasons for his true nobility; only in this way can the possibility of
    living and loving with that dignity and liberty which derive from respect for the truth be ensured for the
    men and women of tomorrow. The precise indications which are offered in the present Instruction
    therefore are not meant to halt the effort of reflection but rather to give it a renewed impulse in
    unrenounceable fidelity to the teaching of the Church.
    In the light of the truth about the gift of human life and in the light of the moral principles which flow
    from that truth, everyone is invited to act in the area of responsibility proper to each and, like the good
    Samaritan, to recognize as a neighbour even the littlest among the children of men (Cf . Lk 10: 2 9-37).
    Here Christ’s words find a new and particular echo: “What you do to one of the least of my brethren,
    you do unto me” (Mt 25:40).
    During an audience granted to the undersigned Prefect after the plenary session of the Congregation for
    the Doctrine of the Faith, the Supreme Pontiff, John Paul II, approved this Instruction and ordered it to
    be published.
    16
    Given at Rome, from the Congregation for the Doctrine of the Faith, February 22, 1987, the Feast of
    the Chair of St. Peter, the Apostle.
    JOSEPH Card. RATZINGER
    Prefect
    ALBERTO BOVONE
    Titular Archbishop of Caesarea in Numidia Secretary
    (1) POPE JOHN PAUL II, Discourse to those taking part in the 81st Congress of the Italian Society of
    Internal Medicine and the 82nd Congress of the Italian Society of General Surgery, 27 October 1980:
    AAS 72 (1980) 1126.
    (2) POPE PAUL VI, Discourse to the General Assembly of the United Nations Organization, 4 October
    1965: AAS 57 (1965) 878; Encyclical Populorum Progressio, 13: AAS 59 (1967) 263.
    (3) POPE PAUL VI, Homily during the Mass closing the Holy Year, 25 December 1975: AAS 68
    (1976) 145; POPE JOHN PAUL II, Encyclical Dives in Misericordia, 30: AAS 72 (1980) 1224.
    (4) POPE JOHN PAUL II, Discourse to those taking part in the 35th General Assembly of the World
    Medical Association, 29 October 1983: AAS 76 (1984) 390.
    (5) Cf. Declaration Dignitatis Humanae, 2.
    (6) Pastoral Constitution Gaudium et Spes, 22; POPE JOHN PAUL II, Encyclical Redemptor Hominis,
    8: AAS 71 (1979) 270-272.
    (7) Cf. Pastoral Constitution Gaudium et Spes, 35.
    (8) Pastoral Constitution Gaudium et Spes, 15; cf. also POPE PAUL VI, Encyclical Populorum
    Progressio, 20: AAS 59 (1967) 267; POPE JOHN PAUL II, Encyclical Redemptor Hominis, 15: AAS
    71 (1979) 286-289; Apostolic Exhortation Familiaris Consortio, 8: AAS 74 (1982) 89.
    (9) POPE JOHN PAUL II, Apostolic Exhortation Familiaris Consortio, 11: AAS 74 (1982) 92.
    (10) Cf. POPE PAUL VI, Encyclical Humanae Vitae, 10: AAS 60 (1968) 487-488.
    (11) POPE JOHN PAUL II, Discourse to the members of the 35th General Assembly of the World
    Medical Association, 29 October 1983: AAS 76 (1984) 393.
    (12) Cf. POPE JOHN PAUL II, Apostolic Exhortation Familiaris Consortio, 11: AAS 74 (1982) 91-92;
    cf. also Pastoral Constitution Gaudium et Spes, 50.
    (13) SACRED CONGREGATION FOR THE DOCTRINE OF THE FAITH, Declaration on Procured
    Abortion, 9, AAS 66 (1974) 736-737.
    (14) POPE JOHN PAUL II, Discourse to those taking part in the 35th General Assembly of the World
    Medical Association, 29 October 1983: AAS 76 (1984) 390.
    (15) POPE JOHN XXIII, Encyclical Mater et Magistra, III: AAS 53 (1961) 447.
    (16) Pastoral Constitution Gaudium et Spes, 24.
    (17) Cf. POPE PIUS XII, Encyclical Humani Generis: AAS 42 (1950) 575; POPE PAUL VI, Professio
    Fidei: AAS 60 (1968) 436.
    (18) POPE JOHN XXIII, Encyclical Mater et Magistra, III: AAS 53 (1961) 447; cf. POPE JOHN
    PAUL II, Discourse to priests participating in a seminar on “Responsible Procreation”, 17 September
    1983, Insegnamenti di Giovanni Paolo II, VI, 2 (1983) 562: “At the origin of each human person there
    is a creative act of God: no man comes into existence by chance; he is always the result of the creative
    love of God”.
    (19) Cf. Pastoral Constitution Gaudium et Spes, 24.
    (20) Cf. POPE PIUS XII, Discourse to the Saint Luke Medical-Biological Union, 12 November 1944:
    Discorsi e Radiomessaggi VI (1944-1945) 191-192.
    (21) Cf. Pastoral Constitution Gaudium et Spes, 50.
    17
    (22) Cf. Pastoral Constitution Gaudium et Spes, 51: “When it is a question of harmonizing married love
    with the responsible transmission of life, the moral character of one’s behaviour does not depend only
    on the good intention and the evaluation of the motives: the objective criteria must be used, criteria
    drawn from the nature of the human person and human acts, criteria which respect the total meaning of
    mutual self-giving and human procreation in the context of true love”.
    (23) Pastoral Constitution Gaudium et Spes, 51.
    (24) HOLY SEE, Charter of the Rights of the Family, 4: L’Osservatore Romano, 25 November 1983.
    (25) SACRED CONGREGATION FOR THE DOCTRINE OF THE FAITH, Declaration on Procured
    Abortion, 12-13: AAS 66 (1974) 738.
    (26) Cf. POPE PAUL VI, Discourse to participants in the Twenty-third National Congress of Italian
    Catholic Jurists, 9 December 1972: AAS 64 ( 1972) 777.
    (27) The obligation to avoid disproportionate risks involves an authentic respect for human beings and
    the uprightness of therapeutic intentions. It implies that the doctor “above all … must carefully evaluate
    the possible negative consequences which the necessary use of a particular exploratory technique may
    have upon the unborn child and avoid recourse to diagnostic procedures which do not offer sufficient
    guarantees of their honest purpose and substantial harmlessness. And if, as often happens in human
    choices, a degree of risk must be undertaken, he will take care to assure that it is justified by a truly
    urgent need for the diagnosis and by the importance of the results that can be achieved by it for the
    benefit of the unborn child himself” (POPE JOHN PAUL II, Discourse to Participants in the Pro-Life
    Movement Congress, 3 December 1982: Insegnantenti di Giovanni Paolo II, V, 3 [1982] 1512). This
    clarification concerning “proportionate risk” is also to be kept in mind in the following sections of the
    present Instruction, whenever this term appears.
    (28) POPE JOHN PAUL II, Discourse to the Participants in the 35th General Assembly of the World
    Medical Association, 29 October 1983: AAS 76 (1984) 392.
    (29) Cf. POPE JOHN PAUL II, Address to a Meeting of the Pontifical Academy of Sciences, 23
    October 1982: AAS 75 (1983) 37: “I condemn, in the most explicit and formal way, experimental
    manipulations of the human embryo, since the human being, from conception to death, cannot be
    exploited for any purpose whatsoever”.
    (30) HOLY SEE, Charter of the Rights of the Family, 4b: L’Osservatore Romano, 25 November 1983.
    (31) Cf. POPE JOHN PAUL II, Address to the Participants in the Convention of the Pro-Life
    Movement, 3 December 1982: Insegnamenti di Giovanni Paolo II, V, 3 (1982) 1511: “Any form of
    experimentation on the foetus that may damage its integrity or worsen its condition is unacceptable,
    except in the case of a final effort to save it from death”. SACRED CONGREGATION FOR THE
    DOCTRINE OF THE FAITH, Declaration on Euthanasia, 4: AAS 72 (1980) 550: “In the absence of
    other sufficient remedies, it is permitted, with the patient’s consent, to have recourse to the means
    provided by the most advanced medical techniques, even if these means are still at the experimental
    stage and are not without a certain risk”.
    (32) No one, before coming into existence, can claim a subjective right to begin to exist; nevertheless,
    it is legitimate to affirm the right of the child to have a fully human origin through conception in
    conformity with the personal nature of the human being. Life is a gift that must be bestowed in a
    manner worthy both of the subject receiving it and of the subjects transmitting it. This statement is to
    be borne in mind also for what will be explained concerning artificial human procreation.
    (33) Cf. POPE JOHN PAUL II, Discourse to those taking part in the 35th General Assembly of the
    World Medical Association, 29 October 1983: AAS 76 (1984) 391.
    (34) Cf. Pastoral Constitution on the Church in the Modern world, Gaudium et Spes, 50.
    (35) Cf. POPE JOHN PAUL II, Apostolic Exhortation Familiaris Consortio, 14: AAS 74 ( 1982) 96.
    (36) Cf. POPE PIUS XII, Discourse to those taking part in the 4th International Congress of Catholic
    Doctors, 29 September 1949: AAS 41 (1949) 559. According to the plan of the Creator, “A man leaves
    his father and his mother and cleaves to his wife, and they become one flesh” (Gen 2:24). The unity of
    18
    marriage, bound to the order of creation, is a truth accessible to natural reason. The Church’s Tradition
    and Magisterium frequently make reference to the Book of Genesis, both directly and through the
    passages of the New Testament that refer to it: Mt 19: 4-6; Mk: 10:5-8; Eph 5: 31. Cf.
    ATHENAGORAS, Legatio pro christianis, 33: PG 6, 965-967; ST CHRYSOSTOM, In Matthaeum
    homiliae, LXII, 19, 1: PG 58 597; ST LEO THE GREAT, Epist. ad Rusticum, 4: PL 54, 1204;
    INNOCENT III, Epist. Gaudemus in Domino: DS 778; COUNCIL OF LYONS II, IV Session: DS 860;
    COUNCIL OF TRENT, XXIV , Session: DS 1798. 1802; POPE LEO XIII, Encyclical Arcanum
    Divinae Sapientiae: ASS 12 (1879/80) 388-391; POPE PIUS XI, Encyclical Casti Connubii: AAS 22
    (1930) 546-547; SECOND VATICAN COUNCIL, Gaudium et Spes, 48; POPE JOHN PAUL II,
    Apostolic Exhortation Familiaris Consortio, 19: AAS 74 (1982) 101-102; Code of Canon Law,
    Can.1056.
    (37) Cf. POPE PIUS XII, Discourse to those taking part in the 4th International Congress of Catholic
    Doctors, 29 September 1949: AAS 41 (1949) 560; Discourse to those taking part in the Congress of the
    Italian Catholic Union of Midwives, 29 October 1951: AAS 43 (1951) 850; Code of Canon Law, Can.
    1134.
    (38) POPE PAUL VI, Encyclical Letter Humanae Vitae, 12: AAS 60 (1968) 488-489.
    (39) Loc. cit., ibid., 489.
    (40) POPE PIUS XII, Discourse to those taking part in the Second Naples World Congress on Fertility
    and Human Sterility, 19 May 1956: AAS 48 (1956) 470.
    (41) Code of Canon Law, Can. 1061. According to this Canon, the conjugal act is that by which the
    marriage is consummated if the couple “have performed (it) between themselves in a human manner”.
    (42) Cf. Pastoral Constitution Gaudium et Spes, 14.
    (43) Cf. POPE JOHN PAUL II, General Audience on 16 January 1980: Insegnamenti di Giovanni
    Paolo II, III, 1 (1980) 148-152.
    (44) POPE JOHN PAUL II, Discourse to those taking part in the 35th General Assembly of the World
    Medical Association, 29 October 1983: AAS 76 (1984) 393.
    (45) Cf. Pastoral Constitution Gaudium et Spes, 51.
    (46) Cf. Pastoral Constitution Gaudium et Spes, 50.
    (47) Cf. POPE PIUS XII, Discourse to those taking part in the 4th International Congress of Catholic
    Doctors, 29 September 1949: AAS 41 (1949) 560: “It would be erroneous … to think that the possibility
    of resorting to this means (artificial fertilization) might render valid a marriage between persons unable
    to contract it because of the impedimentum impotentiae”.
    (48) A similar question was dealt with by POPE PAUL VI, Encyclical Humanae Vitae, 14: AAS 60
    (1968) 490-491.
    (49) Cf. supra: I, 1 ff.
    (50) POPE JOHN PAUL II, Apostolic Exhortation Familiaris Consortio. 14: AAS 74 (1982) 96.
    (51) Cf. Response of the Holy Office, 17 March 1897: DS 3323; POPE PIUS XII, Discourse to those
    taking part in the 4th International Congress of Catholic Doctors, 29 September 1949: AAS 41 (1949)
    560; Discourse to the Italian Catholic Union of Midwives, 29 October 1951: AAS 43 (1951) 850;
    Discourse to those taking part in the Second Naples World Congress on Fertility and Human Sterility,
    19 May 1956: AAS 48 (1956) 471-473; Discourse to those taking part in the 7th International Congress
    of the International Society of Haematology, 12 September 1958: AAS 50 (1958) 733; POPE JOHN
    XXIII, Encyclical Mater et Magistra, III: AAS 53 (1961) 447.
    (52) POPE PIUS XII, Discourse to the Italian Catholic Union of Midwives, 29 October 1951: AAS 43 (
    1951 ) 850.
    (53) POPE PIUS XII, Discourse to those taking part in the 4th International Congress of Catholic
    Doctors, 29 September 1949: AAS 41 (1949) 560.
    (54) SACRED CONGREGATION FOR THE DOCTRINE OF THE FAITH, Declaration on Certain
    Questions Concerning Sexual ethics, 9: AAS 68 (1976) 86, which quotes the Pastoral Constitution
    19
    Gaudium et Spes, 51. Cf. Decree of the Holy Office, 2 August 1929: AAS 21 (1929) 490; POPE PIUS
    XII, Discourse to those taking part in the 26th Congress of the Italian Society of Urology, 8 October
    1953: AAS 45 (1953) 678.
    (55) Cf. POPE JOHN XXIII, Encyclical Mater et Magistra, III: AAS 53 (1961) 447.
    (56) Cf. POPE PIUS XII, Discourse to those taking part in the 4th International Congress of Catholic
    Doctors, 29 September 1949: AAS 41 (1949), 560.
    (57) Cf. POPE PIUS XII, Discourse to the taking part in the Second Naples World Congress on
    Fertility and Human Sterility, 19 May 1956: AAS 48 (1956) 471-473.
    (58) Pastoral Constitution Gaudium et Spes, 50.
    (59) POPE JOHN PAUL II, Apostolic Exhortation Familiaris Consortio, 14: AAS 74 (1982) 97.
    (60) Cf. Declaration Dignitatis Humanae, 7.

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