Other basic characteristics, including type of infertility (P=0.062), PCOS ratio (P<0.001), basal serum FSH (P=0.384), basal antral follicle count (P=0.059), method of ART (P=0.648), number of transferred embryos (P=0.838) and type of transferred embryos (P=0.191), were similar among groups. Here, BRD2 is linked to polycystic ovary syndrome.