PCOS: polycystic ovary syndrome; BMI: body mass index; FSH: follicle stimulating hormone; LH: luteinizing hormone; AMH: anti-müllerian hormone; AFC: antral follicle count; MII: metaphase II oocytes; MI: metaphase I oocytes; GV: germinal vesicle. Here, BRD2 is linked to polycystic ovary syndrome.