Gene association studies have so far identified 16 candidate loci involved in PCOS, including genes involved in gonadotropin action (LHCGR and FSHR), metabolism and sexual development (ESR1), insulin signaling and type 2 diabetes (INSR, THADA, HMGA2) or cell proliferation (YAP1 and SUMO1P1) (14). This evidence concerns the gene INSR and type 2 diabetes mellitus.