Pregnancy , also known as gestation , is the time during which one or more offspring develops inside a woman . [4] A multiple pregnancy involves more than one offspring, such as with twins . [13] Pregnancy can occur by sexual intercourse or assisted reproductive technology . [6] A pregnancy may end in a live birth , abortion , or miscarriage , though access to safe abortion care varies globally. [14] Childbirth typically occurs around 40 weeks from the start of the last menstrual period (LMP). [4] [5] This is just over nine months , where each month averages 31 days. [4] [5] When measured from fertilization it is about 38 weeks. [5] An embryo is the developing offspring during the first eight weeks following fertilization, after which, the term fetus is used until birth. [5] ...
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