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Unintended pregnancy. Unintended pregnancies are pregnancies that are mistimed or unwanted at the time of conception, [1] also known as unplanned pregnancies. [2] [3] Sexual activity without the use of effective contraception through choice or coercion is the predominant cause of unintended pregnancy. Worldwide, the unintended pregnancy rate is ...
Superfetation (also spelled superfoetation – see fetus) is the simultaneous occurrence of more than one stage of developing offspring in the same animal. [1] [2] [3] In mammals, it manifests as the formation of an embryo from a subsequent menstrual cycle, while another embryo or fetus is already present in the uterus.
Birth control, also known as contraception, anticonception, and fertility control, is the use of methods or devices to prevent unintended pregnancy. [1] Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. [2] Planning, making available, and using human birth ...
Morning sickness, also called nausea and vomiting of pregnancy ( NVP ), is a symptom of pregnancy that involves nausea or vomiting. [1] Despite the name, nausea or vomiting can occur at any time during the day. [2] Typically the symptoms occur between the 4th and 16th week of pregnancy. [2]
Roe v. Wade, 410 U.S. 113 (1973), [1] was a landmark decision of the U.S. Supreme Court in which the Court ruled that the Constitution of the United States generally protected a right to have an abortion.
Acute fatty liver of pregnancy is a rare life-threatening complication of pregnancy that occurs in the third trimester or the immediate period after delivery. It is thought to be caused by a disordered metabolism of fatty acids by mitochondria in the fetus, caused by long-chain 3-hydroxyacyl-coenzyme A dehydrogenase deficiency . [2]
False pregnancy (or pseudocyesis, from the Greek pseudes "false" and kyesis "pregnancy") [1] is the appearance of clinical or subclinical signs and symptoms associated with pregnancy although the individual is not physically carrying a fetus. [2] The mistaken impression that one is pregnant includes signs and symptoms such as tender breasts ...
Obstetric ultrasonography, or prenatal ultrasound, is the use of medical ultrasonography in pregnancy, in which sound waves are used to create real-time visual images of the developing embryo or fetus in the uterus (womb). The procedure is a standard part of prenatal care in many countries, as it can provide a variety of information about the ...
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