ScienceContemporaryglobalhigh confidence

As many as 25-50% of women with infertility have endometriosis.

Notes on verification

Confirmed by WHO, ASRM, Johns Hopkins Medicine, and multiple peer-reviewed reviews (Oxford Academic, PMC, PubMed). Minor variation in cited ranges across sources reflects differing study populations, but the 25-50% figure is the most widely cited and consistent. [tier=gold indep_score=0.988 clusters=4 claim_tier=notable | framework convergence=partial on ASRM's synthesis of classical epidemiological studies on endometriosis prevalence among infertile populations (upstreams: American Society for Reproductive Medicine (ASRM) Practice Committee, classical epidemiological studies (e.g., Eskenazi & Warner 1997)) — publishers independent, evidence may not be | kind=empirical eligibility=high (extractor: empirical/medium)]

Sources