Canadian Medical Guide > Biological Sciences > Reproductive and Urinary Physiology > Reproduction > Pregnancy Trimesters Terms and Definitions

Pregnancy Trimesters

Medical Definition:	The three periods of three months each in the normal pregnancy.
Guide Notes:	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
Previously Indexed:	Gestational Age (1968-1974),Pregnancy (1966-1974),Time Factors (1967-1974),specific trimester (1975-1997)

Pregnancy Trimesters Categories.

	Pregnancy Trimester, First - Period of pregnancy from the first day of the last normal menstrual period through the completion of 14 weeks (98 days) of gestation.
	Pregnancy Trimester, Second - Period of pregnancy from the beginning of the 15th through the 28th completed week (99 to 196 days) of gestation.
	Pregnancy Trimester, Third - Period of pregnancy from the beginning of the 29th through the 42nd completed week (197 to 294 days) of gestation.

Pregnancy Trimesters Medical Definitions and Terms

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