FSH, follicle-stimulating hormone; LH, luteinizing hormone; ↑, increased; ↓, decreased; GnRH, gonadotropin-releasing hormone; HMG-CoA, 3-hydroxy-3-methylglutaryl coenzyme A; PCOS, polycystic ovarian syndrome. This evidence concerns the gene BRD2 and polycystic ovary syndrome.