05Endocrine, nutritional or metabolic diseases
Endocrine diseases
Disorders of the gonadal hormone system
5A80Ovarian dysfunction
5A80.4
category
Oligo-ovulation
Definition Oligo-ovulation (less than 4 ovulations in the last 12 months) not related to described categories of endocrine dysfunction. Excludes anovulation related to PCOS, hyperprolactinaemia or amenorrhea.
Also indexed as
Oligo-ovulation
Nearby in Ovarian dysfunction
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
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