Structured Summary
Abstract
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.
MeSH Record
Classification
Broader headings
Related Concepts
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MeSH Record
Synonyms
3 entry terms
- Trimesters, Pregnancy
- Pregnancy Trimester
- Trimester, Pregnancy
MeSH Record
Aspects Covered
11 allowable subheadings
Indexed with the subheadings blood, cerebrospinal fluid, drug effects, ethnology, genetics, immunology, metabolism, physiology, psychology, radiation effects, urine.
MeSH Record
Indexing Annotation
human only; general 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
MeSH Record
History Note
98; use explode 1975-97
MeSH Record
Previous Indexing
- Gestational Age (1968-1974)
- Pregnancy (1966-1974)
- Time Factors (1967-1974)
- specific trimester (1975-1997)
MeSH Hierarchy
Tree Number
AMA Style
References
- National Library of Medicine. Pregnancy Trimesters. Medical Subject Headings (MeSH). 2026. Unique ID D011264. http://id.nlm.nih.gov/mesh/2026/D011264
- Pregnancy Trimesters. In: Wikipedia. https://en.wikipedia.org/wiki/Trimester_(pregnancy)
- Pregnancy Trimesters. In: Wikidata. https://www.wikidata.org/wiki/Q33083015