Phenomena and Processes

Labor Onset

The beginning of true OBSTETRIC LABOR which is characterized by the cyclic uterine contractions of increasing frequency, duration, and strength causing CERVICAL DILATATION to begin (LABOR STAGE, FIRST ).

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The beginning of true OBSTETRIC LABOR which is characterized by the cyclic uterine contractions of increasing frequency, duration, and strength causing CERVICAL DILATATION to begin (LABOR STAGE, FIRST ).

MeSH Record

Classification

Broader headings

Narrower headings

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MeSH Record

Synonyms

3 entry terms
  • Labor Onsets
  • Onset, Labor
  • Onsets, Labor

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; check tags FEMALE & PREGNANCY

MeSH Record

History Note

91(75); was see under LABOR 1975-90

MeSH Hierarchy

Tree Number

  1. G08.686.784w.769w.326.500

MeSH Record

NLM Classification

WQ 305

AMA Style

References

  1. National Library of Medicine. Labor Onset. Medical Subject Headings (MeSH). 2026. Unique ID D007745. http://id.nlm.nih.gov/mesh/2026/D007745
  2. Labor Onset. In: Wikidata. https://www.wikidata.org/wiki/Q67302081