Structured Summary
Abstract
The beginning third of a human PREGNANCY, from the first day of the last normal menstrual period (MENSTRUATION) through the completion of 14 weeks (98 days) of gestation.
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Classification
Broader headings
Related Concepts
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MeSH Record
Synonyms
17 entry terms
- Early Placental Phase
- Pregnancy Trimester, First
- Pregnancy, First Trimester
- Trimester, First
- Early Placental Phases
- First Pregnancy Trimesters
- First Trimester
- First Trimester Pregnancies
- First Trimester Pregnancy
- First Trimesters
- Phase, Early Placental
- Phases, Early Placental
- Placental Phase, Early
- Placental Phases, Early
- Pregnancies, First Trimester
- Pregnancy Trimesters, First
- Trimesters, First
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
MeSH Record
History Note
76; was PREGNANCY, FIRST TRIMESTER 1975
MeSH Record
Previous Indexing
- Gestational Age (1968-1974)
- Pregnancy (1966-1974)
- Time Factors (1967-1974)
MeSH Hierarchy
Tree Number
AMA Style
References
- National Library of Medicine. First Pregnancy Trimester. Medical Subject Headings (MeSH). 2026. Unique ID D011261. http://id.nlm.nih.gov/mesh/2026/D011261
- First Pregnancy Trimester. In: Wikidata. https://www.wikidata.org/wiki/Q25401933