Definition: The three approximately equal periods of a normal human PREGNANCY. Each trimester is about three months or 13 to 14 weeks in duration depending on the designation of the first day of gestation.
human only; GEN or unspecified; prefer specifics; trimesters are indexed only when the point of the article or substantively discussed: they are not sought out routinely nor indexed when merely mentioned; DF: PREGN TRIMESTERS
ExamplesPregnancy Trimester, First; Pregnancy Trimester, Second; Pregnancy Trimester, Third
Other names Trimester, Pregnancy; Pregnancy Trimester; Trimesters, Pregnancy
