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An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell. The resulting fusion of these two cells produces a single-celled zygote that undergoes many cell divisions that produce cells known as blastomeres. The blastomeres are arranged as a solid ball that when reaching a certain size, called a morula, takes in fluid to create a cavity called a blastocoel. The structure is then termed a blastula, or a blastocyst in mammals.
The Dicastery for the Doctrine of the Faith (DDF) is the oldest among the departments of the Roman Curia. Its seat is the Palace of the Holy Office in Rome. It was founded to defend the Catholic Church from heresy and is the body responsible for promulgating and defending Catholic doctrine.
The chorion is the outermost fetal membrane around the embryo in mammals, birds and reptiles (amniotes). It develops from an outer fold on the surface of the yolk sac, which lies outside the zona pellucida, known as the vitelline membrane in other animals. In insects it is developed by the follicle cells while the egg is in the ovary. Some mollusks also have chorions as part of their eggs. For example fragile octopus eggs have only a chorion as their envelope.
Preimplantation genetic diagnosis is the genetic profiling of embryos prior to implantation, and sometimes even of oocytes prior to fertilization. PGD is considered in a similar fashion to prenatal diagnosis. When used to screen for a specific genetic disease, its main advantage is that it avoids selective abortion, as the method makes it highly likely that the baby will be free of the disease under consideration. PGD thus is an adjunct to assisted reproductive technology, and requires in vitro fertilization (IVF) to obtain oocytes or embryos for evaluation. Embryos are generally obtained through blastomere or blastocyst biopsy. The latter technique has proved to be less deleterious for the embryo, therefore it is advisable to perform the biopsy around day 5 or 6 of development.
Evangelium vitae translated in English as 'The Gospel of Life', is a papal encyclical published on 25 March 1995 by Pope John Paul II. It is a comprehensive document setting out the teaching of the Catholic Church on the sanctity of human life and related issues including murder, abortion, euthanasia, and capital punishment, reaffirming the Church's stances on these issues in a way generally considered consistent with previous church teachings.
A culture of life describes a way of life based on the belief that human life at all stages from conception through natural death is sacred. It opposes the destruction of human life at any stage, including abortion, euthanasia, capital punishment, studies and medicines involving embryonic stem cells, and contraception. It also promotes policies that "lift up the human spirit with compassion and love." The term originated in moral theology, especially that of the Catholic Church, and was popularly championed by Pope John Paul II; it has been widely used by religious leaders in evangelical Christianity as well. The philosophy of such a culture is a consistent life ethic.
In religion and philosophy, ensoulment is the moment at which a human or other being gains a soul. Some belief systems maintain 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.
Christians take multiple positions in the debate on the morality of human cloning. Since Dolly the sheep was successfully cloned on 5 July 1996, and the possibility of cloning humans became a reality, Christian leaders have been pressed to take an ethical stance on its morality. While many Christians tend to disagree with the practice, such as Roman Catholics and a majority of fundamentalist pastors, including Southern Baptists, the views taken by various other Christian denominations are diverse and often conflicting. It is hard to pinpoint any one, definite stance of the Christian religion, since there are so many Christian denominations and so few official statements from each of them concerning the morality of human cloning.
The stem cell controversy is the consideration of the ethics of research involving the development and use of human embryos. Most commonly, this controversy focuses on embryonic stem cells. Not all stem cell research involves human embryos. For example, adult stem cells, amniotic stem cells, and induced pluripotent stem cells do not involve creating, using, or destroying human embryos, and thus are minimally, if at all, controversial. Many less controversial sources of acquiring stem cells include using cells from the umbilical cord, breast milk, and bone marrow, which are not pluripotent.
Chorionic villi are villi that sprout from the chorion to provide maximal contact area with maternal blood.
Religious adherents vary widely in their views on birth control. This can be true even between different branches of one faith, as in the case of Judaism and Christianity. Some religious believers find that their own opinions of the use of birth control differ from the beliefs espoused by the leaders of their faith, and many grapple with the ethical dilemma of what is conceived as "correct action" according to their faith, versus personal circumstance, reason, and choice. This article will discuss various views on birth control of the major world religions Christianity, Buddhism, Judaism, Islam, Hinduism, and Baha'i.
The genetics and abortion issue is an extension of the abortion debate and the disability rights movement. Since the advent of forms of prenatal diagnosis, such as amniocentesis and ultrasound, it has become possible to detect the presence of congenital disorders in the fetus before birth. Specifically, disability-selective abortion is the abortion of fetuses that are found to have non-fatal mental or physical defects detected through prenatal testing. Many prenatal tests are now considered routine, such as testing for Down syndrome. Women who are discovered to be carrying fetuses with disabilities are often faced with the decision of whether to abort or to prepare to parent a child with disabilities.
The Human Fertilisation and Embryology Act 1990 is an Act of the Parliament of the United Kingdom. It created the Human Fertilisation and Embryology Authority which is in charge of human embryo research, along with monitoring and licensing fertility clinics in the United Kingdom.
Canon 1397 §2 is a paragraph of the canon 1397 of the 1983 Code of Canon Law of the Catholic Church; the paragraph states: "A person who actually procures an abortion incurs a latae sententiae excommunication".
Donum Vitae is the "Instruction on Respect for Human Life in Its Origin and on the Dignity of Procreation" which was issued on February 22, 1987, by the Congregation for the Doctrine of the Faith. It addresses biomedical issues from the Roman Catholic Church's perspective.
Stem cell laws and policy in the United States have had a complicated legal and political history.
Yury Verlinsky was a Russian-American medical researcher specializing in embryonic and cellular genetics. He is best known as a pioneer in prenatal diagnosis for detecting genetic and chromosomal disorders six weeks earlier than standard amniocentesis. The founding father of pre-implantation genetic diagnosis (PGD) and embryo analysis prior to in-vitro fertilization (IVF), Verlinsky used his polar body biopsy technique to detect potential birth defects in offspring. It is now accepted worldwide as the standard for the most efficient and effective means of analyzing the chromosomal status of an embryo.
The official teachings of the Catechism of the Catholic Church promulgated by Pope John Paul II in 1992 oppose all forms of abortion procedures whose direct purpose is to destroy a zygote, blastocyst, embryo or fetus, since it holds that "human life must be respected and protected absolutely from the moment of conception. From the first moment of his existence, a human being must be recognized as having the rights of a person – among which is the inviolable right of every innocent being to life". However, the Church does recognize as morally legitimate certain acts which indirectly result in the death of the fetus, as when the direct purpose is removal of a cancerous womb. Canon 1397 §2 of the 1983 Code of Canon Law imposes automatic excommunication on Latin Catholics who actually procure an abortion, if they fulfill the conditions for being subject to such a sanction. Eastern Catholics are not subject to automatic excommunication, but by canon 1450 of the Code of Canons of the Eastern Churches they are to be excommunicated by decree if found guilty of the same action, and they may be absolved of the sin only by the eparchial bishop. In addition to teaching that abortion is immoral, the Catholic Church also generally makes public statements and takes actions in opposition to its legality.
Definitions of abortion vary from one source to another. Abortion has many definitions that can differ from each other in significant ways. Given the contentious nature of abortion, lawmakers and other stakeholders often face controversy in defining abortion. Language referring to abortion often reflects societal and political opinions . Influential non-state actors like the United Nations and the Roman Catholic Church have also engendered controversy over efforts to define abortion.
Selective embryo abortion, is a form of non-random, premature termination of embryonic development in plants. Selective embryo abortion assumes that embryo termination depends on the genetic quality of seeds developing within an ovary, and predicts that successfully matured seeds will be of greater fitness than aborted seeds. Consequently, selective embryo abortion has the potential to act as a unique stage of natural selection, influencing the evolution of plant populations and species. This concept was described by botanist John T. Buchholz in 1922 under his framework of developmental selection, which referred to selective embryo abortion as “interovular selection.”
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