WHO defines health as a state of complete physical, mental and social well-being, and not merely the absence of disease or infirmity. Making health for all a reality, and moving towards the progressive realization of human rights, requires that all individuals have access to quality health care, including comprehensive abortion care services – which includes information, management of abortion, and post-abortion care. Lack of access to safe, timely, affordable and respectful abortion care poses a risk to not only the physical, but also the mental and social, well-being of women and girls.
Induced abortion is a simple and common health-care procedure. Each year, almost half of all pregnancies – 121 million – are unintended; 6 out of 10 unintended pregnancies and 3 out of 10 of all pregnancies end in induced abortion. Abortion is safe when carried out using a method recommended by WHO, appropriate to the pregnancy duration and by someone with the necessary skills. However, when women with unwanted pregnancies face barriers to obtaining quality abortion, they often resort to unsafe abortion.
Ensuring that women and girls have access to abortion care that is evidence-based – which includes being safe, respectful and non-discriminatory – is fundamental to meeting the Sustainable Development Goals (SDGs) relating to good health and well-being (SDG3) and gender equality (SDG5) Spontaneous abortions, or miscarriages, occur for many reasons, including disease, trauma, genetic defect, or biochemical incompatibility of mother and fetus. Occasionally a fetus dies in the uterus but fails to be expelled, a condition termed a missed abortion.Induced abortions may be performed for reasons that fall into four general categories: to preserve the life or physical or mental well-being of the mother; to prevent the completion of a pregnancy that has resulted from rape or incest; to prevent the birth of a child with serious deformity, mental deficiency, or genetic abnormality; or to prevent a birth for social or economic reasons (such as the extreme youth of the pregnant female or the sorely strained resources of the family unit). By some definitions, abortions that are performed to preserve the well-being of the female or in cases of rape or incest are therapeutic, or justifiable, abortions.
Numerous medical techniques exist for performing abortions. During the first trimester (up to about 12 weeks after conception), endometrial aspiration, suction, or curettage may be used to remove the contents of the uterus. In endometrial aspiration, a thin, flexible tube is inserted up the cervical canal (the neck of the womb) and then sucks out the lining of the uterus (the endometrium) by means of an electric pump.
In the related but slightly more onerous procedure known as dilatation and evacuation (also called suction curettage, or vacuum curettage), the cervical canal is enlarged by the insertion of a series of metal dilators while the patient is under anesthesia, after which a rigid suction tube is inserted into the uterus to evacuate its contents. When, in place of suction, a thin metal tool called a curette is used to scrape (rather than vacuum out) the contents of the uterus, the procedure is called dilatation and curettage. When combined with dilatation, both evacuation and curettage can be used up to about the 16th week of pregnancy.
From 12 to 19 weeks the injection of a saline solution may be used to trigger uterine contractions; alternatively, the administration of prostaglandins by injection, suppository, or other method may be used to induce contractions, but these substances may cause severe side effects. Hysterotomy, the surgical removal of the uterine contents, may be used during the second trimester or later. In general, the more advanced the pregnancy, the greater the risk to the female of mortality or serious complications following an abortion.
In the late 20th century a new method of induced abortion was discovered that uses the drug RU 486 (mifepristone), an artificial steroid that is closely related to the contraceptive hormone norethnidrone. RU 486 works by blocking the action of the hormone progesterone, which is needed to support the development of a fertilized egg. When ingested within weeks of conception, RU 486 effectively triggers the menstrual cycle and flushes the fertilized egg out of the uterus.
Whether and to what extent induced abortions should be permitted, encouraged, or severely repressed is a social issue that has divided theologians, philosophers, and legislators for centuries. Abortion was apparently a common and socially accepted method of family limitation in the Greco-Roman world. Although Christian theologians early and vehemently condemned abortion, the application of severe criminal sanctions to deter its practice became common only in the 19th century. In the 20th century such sanctions were modified in one way or another in various countries, beginning with the Soviet Union in 1920, with Scandinavian countries in the 1930s, and with Japan and several eastern European countries in the 1950s. In some countries the unavailability of birth-control devices was a factor in the acceptance of abortion. In the late 20th century China used abortion on a large scale as part of its population-control policy. In the early 21st century some jurisdictions with large Roman Catholic populations, such as Portugal and Mexico City, decriminalized abortion despite strong opposition from the church, while others, such as Nicaragua, increased restrictions on it.
A broad social movement for the relaxation or elimination of restrictions on the performance of abortions resulted in the passing of liberalized legislation in several states in the United States during the 1960s. The U.S. Supreme Court ruled in Roe v. Wade (1973) that unduly restrictive state regulation of abortion was unconstitutional, in effect legalizing abortion for any reason for women in the first three months of pregnancy. A countermovement for the restoration of strict control over the circumstances under which abortions might be permitted soon sprang up, and the issue became entangled in social and political conflict
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