Tags: Disease.
Pregnancy is the fertilization and development of one or more offspring known as an embryo or fetus in a woman’s uterus. It is the common name for gestation in humans. A multiple pregnancy involves more than one embryo or fetus in a single pregnancy such as with twins. Childbirth usually occurs about 38 weeks after conception; in women who have a menstrual cycle length of four weeks this is approximately 40 weeks from the start of the last normal menstrual period (LNMP).
