Lean PCOS = BMI <25 kg/m2, obese PCOS = BMI ≥ 25 kg/m2, HOMA-IR = homeostasis model assessment-insulin resistance, HDL-c = high-density lipoprotein cholesterol, LH = luteinizing hormone, FSH = follicle-stimulating hormone, PCOS = polycystic ovarian syndrome. This evidence concerns the gene BRD2 and polycystic ovary syndrome.