Pregnancy Trimesters

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.

Year introduced: 1998

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Tree Number(s): G08.686.707

MeSH Unique ID: D011264

Entry Terms:

• Trimesters, Pregnancy
• Pregnancy Trimester
• Trimester, Pregnancy

Previous Indexing:

• Gestational Age (1968-1974)
• Pregnancy (1966-1974)
• specific trimester (1975-1997)
• Time Factors (1967-1974)

All MeSH Categories
Phenomena and Processes Category
Reproductive and Urinary Physiological Phenomena
Reproductive Physiological Phenomena
Pregnancy Trimesters
Pregnancy Trimester, First
Pregnancy Trimester, Second
Pregnancy Trimester, Third