Polycystic Ovary Syndrome

Polycystic Ovary Syndrome is indexed under Metabolic & Endocrine, Reproductive Endocrine. Also known as PCOS, Stein-Leventhal syndrome.

US prevalence

Estimated 5-10% of women in the United States have PCOS Source: NICHD — Infertility fact sheet / PCOS. Cites federal and non-federal sources, and the record does not say which one gave this figure. Label: REPORTED.

ICD-10-CM codes

E28.2

Typical onset

Reproductive age (15-44); often diagnosed in 20s-30s

Course

lifelong

Body systems

endocrine, reproductive

Sex differences

Exclusively affects females (by definition)

Racial and ethnic differences

May be underdiagnosed in Black and Hispanic women; phenotype varies by ethnicity

What this page does not establish

These figures describe populations, not individuals, and none of them is a diagnosis or a treatment recommendation. Prevalence estimates are approximate and reflect published ranges. Disparity figures are reported patterns, not causes.

Taxonomy last reviewed 2026-05-19. Each figure on the interactive page carries its own source and retrieval date, which can be later than this review.

Browse all indexed conditions · Source registry · Methodology · Known limitations