Ensoulment

In religion, ensoulment is the moment at which a human being gains a soul. Some religions say that a soul is newly created within a developing child and others, especially in religions that believe in reincarnation, that the soul is pre-existing and added at a particular stage of development.

In the time of Aristotle it was widely believed that the human soul entered the forming body at 40 days (male embryos) or 90 days (female embryos), and quickening was an indication of the presence of a soul. Other religious views are that ensoulment happens at the moment of conception; or when the child takes the first breath after being born;[1] at the formation of the nervous system and brain; at the first brain activity; or when the fetus is able to survive independently of the uterus (viability).[2]

The concept is closely related to debates on the morality of abortion as well as the morality of contraception. Religious beliefs that human life has an innate sacredness to it have motivated many statements by spiritual leaders of various traditions over the years. However, the three matters are not exactly parallel, given that various figures have argued that some kind of life without a soul, in various contexts, still has a moral worth that must be considered.

Ancient Greeks

Among Greek scholars, Hippocrates (c.460 – c.370 BC) believed that the embryo was the product of male semen and a female factor, but Aristotle (384 – 322 BC) held that only male semen gave rise to an embryo, while the female only provided a place for the embryo to develop.[3] Aristotle believed a fetus in early gestation has the soul of a vegetable, then of an animal, and only later became "animated" with a human soul by "ensoulment". For him, ensoulment occurred 40 days after conception for male fetuses and 90 days after conception for female fetuses,[4][5] the stage at which, it was held, movement is first felt within the womb and pregnancy was certain.[6][7] This is called epigenesis, which is "the theory that the germ is brought into existence (by successive accretions), and not merely developed, in the process of reproduction,"[8] in contrast to the theory of preformation, which asserts the "supposed existence of all the parts of an organism in rudimentary form in the egg or the seed;"[9] modern embryology, which finds both that an organism begins with an inherited genetic code and that embryonic stem cells can develop epigenetically into a variety of cell types, may be seen as supporting a balance between the views.[10]

Stoicism maintained that the living animal soul was received only at birth, through contact with the outer air,[11] and was transformed into a rational soul only at fourteen years of age.[12]

Epicureanism saw the origin of the soul (considered to consist of only a small number of atoms even in adults) as simultaneous with conception.[13]

Pythagoreanism also considered ensoulment to occur at conception.[14]:109

Christianity

Catholic Church

See also for a late 20th Century view: Eunuchs for the Kingdom of Heaven

On 27 November 2010, Pope Benedict XVI stated

“from the moment of its conception life must be guarded with the greatest care.”[15] [...] With regard to the embryo in the mother's womb, science itself highlights its autonomy, its capacity for interaction with the mother, the coordination of biological processes, the continuity of development, the growing complexity of the organism.
It is not an accumulation of biological material but rather of a new living being, dynamic and marvelously ordered, a new individual of the human species. This is what Jesus was in Mary’s womb; this is what we all were in our mother’s womb. We may say with Tertullian, an ancient Christian writer: “the one who will be a man is one already” (Apologeticum IX, 8), there is no reason not to consider him a person from conception.[16]

In relation to elective abortion, Pope John Paul II wrote about ensoulment in his 1995 encyclical letter Evangelium Vitae that:

Throughout Christianity's two thousand year history, this same doctrine of condemning all direct abortions has been constantly taught by the Fathers of the Church and by her Pastors and Doctors. Even scientific and philosophical discussions about the precise moment of the infusion of the spiritual soul have never given rise to any hesitation about the moral condemnation of abortion.[17]

While the Church has always condemned abortion, changing beliefs about the moment the embryo gains a human soul have led their stated reasons for such condemnation, and the classification in canon law of the sin of abortion, to change over time.[18][19]

Historical development

From the 12th century, when the West first came to know of Aristotle more than his works on logic,[20][21] mediaeval declarations by Popes and theologians on ensoulment were based on the Aristotelian hypothesis.

Aristotle's epigenetic view of successive life principles ("souls") in a developing human embryo—first a vegetative and then a sensitive or animal soul, and finally an intellective or human soul, with the higher levels able to carry out the functions also of the lower levels[22]—was the prevailing view among early Christians, including Tertullian, Augustine, and Jerome.[23][24][4][18] Lars Østnor says this view was only "presaged" by Augustine,[18] who belongs to a period later than that of early Christianity. According to David Albert Jones, this distinction appeared among Christian writers only in the late fourth and early fifth century, while the earlier writers made no distinction between formed and unformed, a distinction that Saint Basil of Caesarea explicitly rejected.[14]:72–73 While the Hebrew text of the Bible only required a fine for the loss of a fetus, whatever its stage of development, the Greek Septuagint (LXX) translation of the Hebrew text, a pre-Christian translation that the early Christians used, introduced a distinction between a formed and an unformed fetus and treated destruction of the former as murder.[25]:9, 24 It has been commented that "the LXX could easily have been used to distinguish human from non-human fetuses and homicidal from non-homicidal abortions, yet the early Christians, until the time of Augustine in the fifth century, did not do so."[26]

The view of early Christians on the moment of ensoulment is also said to have been not the Aristotelian, but the Pythagorean:

As early as the time of Tertullian in the third century, Christianity had absorbed the Pythagorean Greek view that the soul was infused at the moment of conception. Though this view was confirmed by St. Gregory of Nyssa a century later, it would not be long before it would be rejected in favour of the Septuagintal notion that only a formed fetus possessed a human soul. While Augustine speculated whether "animation" might be present prior to formation, he determined that abortion could only be defined as homicide once formation had occurred. Nevertheless, in common with all early Christian thought, Augustine condemned abortion from conception onward.[25]:40

Through the Latin translations of Averroes's (1126–1198) work beginning in the 12th century the legacy of Aristotle was recovered in the West - Christian philosophers such as Thomas Aquinas (1224–1274) adapted largely to his views,[1][4][27][28][29] and because they believed that the early embryo did not have a human soul, they did not necessarily see early abortion as murder, although they condemned it nonetheless.[4][18][23][24]:150 Aquinas in his main work „Summa Theologica“ states (Qustion 118 article 2 ad 2)“… that the intellectual soul is created by God at the end of human generation“: some contemporary readers like to interprete that specific passage int he way as if Aquinas ment „the end of human generation“ being 40 or 80 days after conception (which would mean even Jesus himself did not have the „intellectual soul“ for 40 days after conception – a thing Aquinas in fact never said).[30]

The 1312 Council of Vienne declared that the substance of the rational or intellectual soul is of itself and essentially the form of the human body[31] and affirmed Aquinas's stance on delayed hominization.[32]

In 1588, Pope Sixtus V issued the Bull Effraenatam, which subjected those that carried out abortions at any stage of gestation with automatic excommunication and the punishment by civil authorities applied to murderers; but a mere three years later, finding that the results had not been as positive as was hoped, his successor Pope Gregory XIV limited the excommunication to abortion of a formed fetus.[14]:71–72[33][34]

In 1679, Pope Innocent XI publicly condemned sixty-five propositions taken chiefly from the writings of Escobar, Suarez and other casuists (mostly Jesuit casuists, who had been heavily attacked by Pascal in his Provincial Letters) as propositiones laxorum moralistarum (propositions of lax moralists) and "at least scandalous and in practice dangerous," and forbade anyone to teach them under penalty of excommunication. The condemned propositions included:

34. It is lawful to procure abortion before ensoulment of the fetus lest a girl, detected as pregnant, be killed or defamed.

35. It seems probable that the fetus (as long as it is in the uterus) lacks a rational soul and begins to first have one when it is born; and consequently it must be said that no abortion is homicide.[35]

In the 1869 Bull Apostolicae Sedis, Pius IX rescinded Gregory XIV's not-yet-animated fetus exception and re-enacted the penalty of excommunication for abortions at any stage of pregnancy, which even before that were never seen as merely venial sins.[36] Since then, canon law makes no distinction as regards excommunication between stages of pregnancy at which abortion is performed.

In spite of the difference in ecclesiastical penalties imposed during the period when the theory of delayed ensoulment was accepted as scientific truth,[37][38] abortion at any stage has always been condemned by the Church[39] and continues to be so.[40][41] However, in its official declarations, the Catholic Church avoids taking a position on the philosophical question of the moment when a human person begins to be:

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". 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 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.[42]

Citing the possibly first-century Didache and the Letter of Barnabas of about the same period, the Epistle to Diognetus and Tertullian, the Catholic Church declares that "since the first century the Church has affirmed the moral evil of every procured abortion. This teaching has not changed and remains unchangeable. Direct abortion, that is to say, abortion willed either as an end or a means, is gravely contrary to the moral law."[43]

Even when the prevailing scientific theory considered that early abortion was the killing of what was not yet a human being, the condemnation of abortion at any stage was sometimes expressed in the form of making it equivalent to homicide. Accordingly, the article on abortion in the Catholic Encyclopedia states:

The early Christians are the first on record as having pronounced abortion to be the murder of human beings, for their public apologists, Athenagoras, Tertullian, and Minutius Felix (Eschbach, "Disp. Phys.", Disp. iii), to refute the slander that a child was slain, and its flesh eaten, by the guests at the Agapæ, appealed to their laws as forbidding all manner of murder, even that of children in the womb. The Fathers of the Church unanimously maintained the same doctrine. In the fourth century the Council of Eliberis decreed that Holy Communion should be refused all the rest of her life, even on her deathbed, to an adulteress who had procured the abortion of her child. The Sixth Ecumenical Council determined for the whole Church that anyone who procured abortion should bear all the punishments inflicted on murderers. In all these teachings and enactments no distinction is made between the earlier and the later stages of gestation. For, though the opinion of Aristotle, or similar speculations, regarding the time when the rational soul is infused into the embryo, were practically accepted for many centuries still it was always held by the Church that he who destroyed what was to be a man was guilty of destroying a human life.[44]

Buddhism

Buddhism describe clearly and analytical manner life begin at conception with non-soul concept. All of bellow content are according to the Theravada Buddhism(pure Buddhism) or Pāli Canon (Tipitaka).

These things described in Abhidhamma in Pāli Canon. Conception is a complex thing and going to the level beyond an atom according to the Buddhism. Three condition must be fulfilled

1)Mother and father should together 2)Mother should be in correct time 3)Came of the Gandhabbā(a being[generation of consciousness / Viññāṇa] fit and ready to be born to the parents concerned.

According to the Buddhism there is no permanent thing(such as a soul) going from life to life, only a changing generation of non-material[Nāma] and material[Rūpa] collections are exist). Non-soul(non-self) concept is called Anatta and it is a very basic concept in Buddhism. Anattā is the last of the Three Marks of Existence, which, when grasped strategically, leads to attain Nirvana(eternal happiness status described in Buddhism).

Patisandhi(relinking) Chitta(Basic unit of the mind is called Chitta as in Abhidhamma. life time is shorter than one trillionth part of a second) is the type of consciousness one experiences at the moment of conception. It is called as Patisandhi Citta(relinking consciousness) because it links the past with the present. This Patisandhi Citta is conditioned by the powerful thought or remind( related to a Karma[deed] done in the past by ding being. This Karma becomes the Janaka Karma which creates the new life) one experiences at the dying moment. This is regarded as the source for the new life stream. In the course of one particular life there is only one Patisandhi Citta. The mental contents of Bhavaïga Citta, which later arises an infinite number of times during one’s lifetime, and Cuti Citta, which arises only once at the final moment of death, are identical with those of Patisandhi Citta.

Once sperm and ovum cells connected it is a place where Patisandhi Citta can arise. When Patisandhi Citta of a Gandhabba arise at sperm and ovum cells of the parents, the embryo in the mother’s womb has formed. This is the moment of conception(Okkanti). Life has begun.

At the moment of conception three special type of Rupa Kalapas( called as Dasaka. Basic unit of matter is called 'Rupa Kalapa', which is made from octad/eight entities. But Dasaka made from ten entities. life time of a 'Rupa Kalapa' is very very short but longer than life time of a Chitta) are generated through Karma. Those are decads of sex, body, and the mind-base. The sex decad(Bhava Dasaka) has the essential octad plus the sex element, either male or female, and the life element. The body decad(Kaya Dasaka) is made up of the essential octad plus the element of bodily sensitivity and the life element. The mind-base decad(Vatthu Dasaka) is made up of the essential octad plus the mind-base element and the life element. After the embryo has been formed through these three decads, from about the eleventh week of gestation onwards, the decads of the other four sense organs begin to form. Karma causes and sustains these material phenomena through the whole course of life.[45] [46] [47]

According to the Buddhism life begin at the conception which occur at near time after mother and father together. Very first three Rupa Kalapas are smaller than an atom in size( of course smaller than a cell ). This is the starting base of the Astral Body(Sukshama Kaya / Manomaya Kaya). According to the Buddhism before the Lord Buddha teach these facts, no one knows how these things happen even higher beings so they thought the soul concept

Judaism

Jewish views on ensoulment have varied. Rabbi David Feldman states that the Talmud discusses the time of ensoulment, but considers the question unanswerable and irrelevant to the abortion question.[48] In recounting a purported conversation in which the rabbi Judah the Prince, who said the soul (neshama) comes into the body when the embryo is already formed, was convinced by Antoninus Pius that it must enter the body at conception, and considered the emperor's view to be supported by Job 10:12,[49][50] the tractate Sanhedrin of the Talmud mentions two views on the question.

In a variant reading the rabbi's first statement was that the soul entered the body only at birth.[51]

Other passages in the Talmud, such as Yevamot 69a and Nidda 30b have been interpreted as implying that ensoulment may occur only after forty days of gestation.[52] The Talmud passages, whether speaking of ensoulment at conception or only after forty days, place the views of the rabbis within Greco-Roman culture, whose ideas the rabbis then linked with texts of Scripture and endowed with theological significance.[53]

The view of ensoulment at conception harmonizes with general lore among rabbis about conscious activity before birth.[54] However, most of them did not apply the word nefesh, meaning soul or person, to a fetus still in the womb.[49] The latter half of the Second Temple period saw increasing acceptance of the idea of the soul as joining the body at birth and leaving it again at death.[55]

One Jewish view put ensoulment even later than birth, saying that it occurs when the child first answers "Amen".[48]

The rabbis in fact formulated no fully developed theory of the timing or nature of ensoulment.[54] It has been suggested that the reason why they were not more concerned about the exact moment of ensoulment is that Judaism does not believe in strict separation of soul and body.[56]

Islam

Islam does not traditionally hold that ensoulment occurs at the point of conception. Two passages in the Qur'an describe the fetal development process:

We created man from an essence of clay, then We placed him as a drop of fluid (nutfah) in a safe place, then We made that drop into a clinging form (alaqah), and We made that form into a lump of flesh (mudghah), and We made that lump into bones (idhaam), and We clothed those bones with flesh (lahm), and later We made him into other forms—glory be to God, the best of creators! (23:12-14)
...We created you from dust, then from a drop of fluid (nutfah), then a clinging form ('alaqah), then a lump of flesh (mudghah), both shaped and unshaped: We mean to make Our power clear to you. Whatever We choose We cause to remain in the womb for an appointed time, then We bring you forth as infants and then you grow and reach maturity. ... (22:5)

Traditional scholarship places the point of ensoulment anywhere between 40 and 120 days after conception [57] based on a Hadith of the Prophet Muhammed narrated in Saheeh Muslim:

When 42 nights have passed over the conceptus, God sends an angel to it, who shapes it (into human form) and makes its hearing, sight, muscles and bones…[58]

Contemporary scholarship, however, is more likely to more strongly restrict or even forbid abortion, on the grounds that modern technology has permitted us to perceive life in the womb earlier than was previously possible. Most schools of thought, traditional and modern, make allowances for circumstances threatening the health or life of the mother.

See also

References

  1. 1 2 Embodiment, morality, and medicine, by Lisa Sowle Cahill and Margaret A. Farley
  2. ↑ "BBC - Religion & Ethics - When is the foetus 'alive'?: The stages of foetal development". Retrieved 2009-01-05.
  3. ↑ Clift D, Schuh M (2013). "Restarting life: fertilization and the transition from meiosis to mitosis (Box 1)". Nature Reviews Molecular Cell Biology 14 (9): 549–62. doi:10.1038/nrm3643. PMC 4021448. PMID 23942453.
  4. 1 2 3 4 A companion to bioethics By Helga Kuhse, Peter Singer
  5. ↑ ReligiousTolerance.org
  6. ↑ Aristotle, History of Animals, book VII, part III
  7. ↑ Norman M. Ford, When Did I Begin? Conception of the Human Individual in History, Philosophy and Science (Cambridge & New York, Cambridge University Press ISBN 978-0-521-42428-8), p. 28
  8. ↑ "Oxford English Dictionary". epigenesis. Retrieved 2011-01-31.
  9. ↑ "Oxford English Dictionary". preformation. Retrieved 2011-01-31.
  10. ↑ For a discussion of the differences between epigenesis and the theory of preformation, see this: Jane Maienschein. "Epigenesis and Preformationism". Stanford Encyclopedia of Philosophy. Retrieved 2011-01-31.
  11. ↑ A.A. Long, Stoic Studies (University of California Press 2001 ISBN 978-0-520-22974-7), p. 237
  12. ↑ Tad Brennan, The Stoic Life (Oxford University Press 2005 ISBN 978-0-19-925626-6), p. 155
  13. ↑ Norman Wentworth DeWitt, Epicurus and His Philosophy (University of Minnesota 1954), p. 201
  14. 1 2 3 David Albert Jones, The Soul of the Embryo (Continuum International 2004 ISBN 978-0-8264-6296-1)
  15. ↑ Roman Catholic Church (1965-12-07). "Gaudium et Spes". n. 51. Retrieved 2011-03-22.
  16. ↑ Pope Benedict XVI (2010-11-27). "Celebration of First Vespers of the First Sunday of Advent for unborn life". Retrieved 2011-03-22. Watch the video here, and see the pictures here.
  17. ↑ Pope John Paul II (1995-03-25). "Evangelium Vitae". 61. Retrieved 2011-01-31.
  18. 1 2 3 4 Stem cells, human embryos and ethics: interdisciplinary perspectives: Lars Østnor, Springer 2008
  19. ↑ Ana S. Iltis, Mark J. Cherry, At the Roots of Christian Bioethics (M & M Scrivener Press 2010 ISBN 978-0-9764041-8-7), p. 166
  20. ↑ Encyclopedia of Christian Theology, "Aristotelianism, Christian"
  21. ↑ James Edward McClellan, Harold Dorn, Science and Technology in World History (Johns Hopkins University Press 2006 ISBN 0-8018-8360-1), p. 184
  22. ↑ Aquinas notes in Summa Contra Gentiles, lib. 2 cap. 88 n. 3 that "Aristotle teaches in the De generatione animalium [II, 3] [that] the fetus is an animal before becoming a man."
  23. 1 2 Dictionary of ethics, theology and society By Paul A. B. Clarke, Andrew Linzey
  24. 1 2 When Children Became People: the birth of childhood in early Christianity by Odd Magne Bakke
  25. 1 2 Daniel Schiff, Abortion in Judaism (Cambridge University Press 2002 ISBN 978-0-521-52166-6)
  26. ↑ Paul T. Stallsworth, Ruth S. Brown (editors), The Church & Abortion (Abingdon Press 1993 ISBN 978-0-687-07852-3), p. 42
  27. ↑ Summa Theologiae Iª q. 118 a. 2 ad 2. Aquinas's fullest treatment of this is in his De potentia, q. 3 a. 9 ad 9 (Reply to the Ninth Objection).
  28. ↑ Haldane, John; Lee, Patrick (2003). "Aquinas on Human Ensoulment, Abortion and the Value of Life". Philosophy 78: 255–278. doi:10.1017/s0031819103000275.
  29. ↑ For a criticism of arguments for "delayed hominization," see also this article by Fr. Benedict Ashley, O.P.
  30. ↑ Applied Ethics: A Sourcebook, chapter 5: Abortion, by James Fieser, 2010
  31. ↑ Decrees of the Council of Vienne
  32. ↑ Encyclopedia of Catholicism
  33. ↑ Nicholas Terpstra, Lost Girls: Sex and Death in Renaissance Florence (Johns Hopkins University Press 2010 ISBN 978-0-8018-9499-2), p. 91
  34. ↑ Jean Reith Schroedel, Is the Fetus a Person? (Cornell University Press 2000 ISBN 978-0-8014-3707-6), p. 19
  35. ↑ Catholic Moral Tradition: "In Christ, a New Creation", David Bohr, Our Sunday Visitor Publishing, 1999, ISBN 0-87973-931-2, p. 293
  36. ↑ Johnstone, Brian V. (March 2005). "Early Abortion: Venial or Mortal Sin?". Irish Theological Quarterly 70 (1): 60. doi:10.1177/002114000507000104. An excerpt can be found here.
  37. ↑ "In the Middle Ages, while the reception of his (Aristotle's) works was a great boon to philosophy, the influence of his scientific works was damaging to science" (Anthony Kenny, Essays on the Aristotelian Tradition (Oxford University Press 2000 ISBN 0-19-825068-1), p. 3).
  38. ↑ The Aristotelian Tradition, p. 3
  39. ↑ Theologians' brief submitted to the House of Lords Select Committee on Stem Cell Research. This document cites many early Christian writers who condemn all forms of abortion. Some of the writers say that a human being begins at conception, thus excluding delayed ensoulment.
  40. ↑ The 2008 declaration Dignitas Personae, which describes abortion as "the deliberate and direct killing, by whatever means it is carried out, of a human being in the initial phase of his or her existence, extending from conception to birth" (Dignitas personae, 23).
  41. ↑ T.L. Frazier, The Early Church and Abortion
  42. ↑ Instruction Donum vitae of the Congregation for the Doctrine of the Faith
  43. ↑ Catechism of the Catholic Church, 2271
  44. ↑ Catholic Encyclopedia, see Abortion
  45. ↑ http://www.abhinawarama.com/abhidamma.html
  46. ↑ http://www.accesstoinsight.org/lib/authors/nanamoli/PathofPurification2011.pdf
  47. ↑ http://www.accesstoinsight.org/lib/authors/mendis/wheel322.html
  48. 1 2 David Feldman, "Jewish Views on Abortion" in Steven Bayme, Gladys Rosen (editors), The Jewish Family and Jewish Continuity (KTAV 1994 ISBN 978-0-88125-495-2), p. 239
  49. 1 2 Avraham Steinberg, "Jewish Perspectives" in Shraga Blazer, Etan Z. Zimmer (editors), The Embryo (Karger 2004 ISBN 978-3-8055-7802-8), p. 34
  50. ↑ Sanhedrin, 11
  51. ↑ Daniel Schiff, Abortion in Judaism (Cambridge University Press 2002 ISBN 978-0-521-52166-6), p. 42, footnote 38
  52. ↑ John D. Loike and Rabbi Moshe Tendler, "Halachic Challenges Emerging From Stem Cell Research" in Jewish Political Studies Review 21:3-4 (Fall 2009)
  53. ↑ Gwynn Kessler, Conceiving Israel (University of Pennsylvania Press 2009 ISBN 978-0-8122-4175-4), pp. 68-69
  54. 1 2 Schiff, Abortion in Judaism, p. 43
  55. ↑ Adele Berlin, Maxine Grossman (editors), The Oxford Dictionary of the Jewish Religion (Oxford University Press 2011 ISBN 978-0-19-973004-9), p. 700
  56. ↑ New South Wales Board of Jewish Education, "Judaism and the Body"
  57. ↑ Abdul-Majeed A. Zindani, Mustafa A. Ahmed, Joe Leigh Simpson (1994). "Human Development during the first 40 days". Retrieved 2013-06-16.
  58. ↑ T.V.N. Persaud, Mustafa A. Ahmed and Abdul-Majeed A. Zindani (1994). "Human Development after the 42nd day". Retrieved 2013-06-16.

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