Phenomena and Processes

Gestational Age

The age of the conceptus, beginning from the time of FERTILIZATION. In clinical obstetrics, the gestational age is often estimated from the onset of the last MENSTRUATION which is about 2 weeks before OVULATION and fertilization. It is also estimated to begin from fertilization, estrus, coitus, or artificial insemination.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The age of the conceptus, beginning from the time of FERTILIZATION. In clinical obstetrics, the gestational age is often estimated from the onset of the last MENSTRUATION which is about 2 weeks before OVULATION and fertilization. It is also estimated to begin from fertilization, estrus, coitus, or artificial insemination.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

See Also

MeSH Record

Synonyms

14 entry terms
  • Age, Gestational
  • Ages, Gestational
  • Gestational Ages
  • Chronologic Fetal Maturity
  • Embryologic Age
  • Fetal Age
  • Fetal Maturity, Chronologic
  • Maturity, Chronologic Fetal
  • Age, Embryologic
  • Age, Fetal
  • Ages, Embryologic
  • Ages, Fetal
  • Embryologic Ages
  • Fetal Ages

MeSH Record

Indexing Annotation

mammalian only; for fetus not mother

MeSH Record

History Note

70(68)

MeSH Record

Previous Indexing

  • Embryo (1966-1967)
  • Fetus (1966-1967)
  • Infant, Premature (1966-1967)

MeSH Hierarchy

Tree Numbers

  1. G07.345.500w.325w.235.968w
  2. G08.686.320w

MeSH Record

NLM Classification

WQ 210.5

AMA Style

References

  1. National Library of Medicine. Gestational Age. Medical Subject Headings (MeSH). 2026. Unique ID D005865. http://id.nlm.nih.gov/mesh/2026/D005865
  2. Gestational Age. In: Wikipedia. https://en.wikipedia.org/wiki/Gestational_age
  3. Gestational Age. In: Wikidata. https://www.wikidata.org/wiki/Q2253111