AMH and polycystic ovary syndrome: Recent multiethnic studies reveal striking variations: Samoan women exhibit paradoxically high AMH levels (95th percentile: 7.02 ng/ml) independent of BMI (10), whereas East Asian women require 15%–20% lower thresholds (3.8–4.2 ng/ml) than Europeans (4.7–5.1 ng/ml) to avoid overdiagnosis, These differences mirror PCOS prevalence heterogeneity, ranging from 3.4% in Samoans to 7.3% in Chinese populations (11).