Table 1: Phenotype classification of PCOS patients in different populations.

Features Phenotype A HA + OA + PCO (%) Phenotype B HA + OA (%) Phenotype C HA + PCO (%) Phenotype D OA + PCO (%) Palermo, Italy1 53.9 8.9 28.8 8.4 Erzurum, Turkey2 44.1 22.8 14.2 18.9 Sao Paulo, Brazil3 58.4 7.9 11.1 22.6 Mexico City, Mexico4 64.5 32.6 2.9 0

HA: hyperandrogenism; OA: oligo-anovulation; PCO: polycystic ovaries. The NIH criteria recognizes A and B phenotypes, the Rotterdam consensus accepts all four phenotypes, and the AES-PCOS admits A, B, and C phenotypes. Data taken from 1Guastella et al. [14], 2Yilmaz et al. [15], 3Melo et al. [16], and 4Moran et al. [17].