Pregnancy

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] Symptoms of early pregnancy may include missed periods, tender breasts, nausea and vomiting, hunger, and frequent urination.^[1] Pregnancy may be confirmed with a pregnancy test.^[7]

Culled from Wikipedia.