Pregnancy Health

This article is about pregnancy in female humans. For pregnancy in non-human animals, see Gestation. For pregnancy in males, see Male pregnancy.
A pregnant woman near delivery

Pregnancy

Classification and external resources

ICD-9 V22

Pregnancy (latin "graviditas") is the carrying of one or more offspring, known as a fetus or embryo, inside the uterus of a female. 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 surgical field that studies and cares for high risk pregnancy. Midwifery is the non-surgical field that cares for pregnancy and pregnant women.
Childbirth usually occurs about 38 weeks after conception; i.e., approximately 40 weeks from the last normal menstrual period (LNMP) in humans. The World Health Organization defines normal term for delivery as between 37 weeks and 42 weeks[citation needed]. The calculation of this date involves the assumption of a regular 28-day menstrual cycle.

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