LOD: laparoscopic ovarian drilling; PCOS: polycystic ovarian syndrome; AMH: anti-Mullerian hormone; AFC: antral follicle count; FSH: follicle-stimulating hormone; LH: luteinizing hormone; OHSS: ovarian hyperstimulation syndrome; OV: ovarian volume; BLOD: bilateral laparoscopic ovarian drilling; BMI: body mass index; ULOD: unilateral laparoscopic ovarian drilling. Here, BRD2 is linked to ovarian hyperstimulation syndrome.