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All About Pregnancy - Your A to Z.
Pregnancy (latin graviditas) is the carrying of one or more human offspring, known as a fetus or embryo, inside the uterus of a female human. In a pregnancy, there can be multiple gestations, as in the case of twins or triplets. Human pregnancy is the most studied of all mammalian pregnancies. Obstetrics is the medical field that studies and treats pregnant patients.
Childbirth usually occurs about 38 weeks from fertilization, i.e., approximately 40 weeks from the start of the last menstruation in humans. Thus, pregnancy lasts about nine months, although the exact definition of the English word “pregnancy” is a subject of controversy.
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