Named Groups

Twins

Two individuals derived from two FETUSES that were fertilized at or about the same time, developed in the UTERUS simultaneously, and born to the same mother. Twins are either monozygotic (TWINS, MONOZYGOTIC) or dizygotic (TWINS, DIZYGOTIC).

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Two individuals derived from two FETUSES that were fertilized at or about the same time, developed in the UTERUS simultaneously, and born to the same mother. Twins are either monozygotic (TWINS, MONOZYGOTIC) or dizygotic (TWINS, DIZYGOTIC).

MeSH Record

Classification

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MeSH Record

Synonyms

1 entry terms
  • Twin

MeSH Record

Aspects Covered

7 allowable subheadings

Indexed with the subheadings classification, education, genetics, history, legislation & jurisprudence, psychology, statistics & numerical data.

MeSH Record

Indexing Annotation

human only: for animals use LITTER SIZE; PREGNANCY, TWIN is also available

MeSH Hierarchy

Tree Number

  1. M01w.438w.873w

AMA Style

References

  1. National Library of Medicine. Twins. Medical Subject Headings (MeSH). 2026. Unique ID D014427. http://id.nlm.nih.gov/mesh/2026/D014427
  2. Twins. In: Wikipedia. https://en.wikipedia.org/wiki/Twin
  3. Twins. In: Wikidata. https://www.wikidata.org/wiki/Q159979