Significant differences were found in the maternal age (P<0.001), paternal age (P<0.001), duration of infertility (P<0.001), type of infertility (P<0.001), basal serum FSH level (P<0.001), basal antral follicle count (P<0.001), dosage of gonadotropin (P<0.001), duration of ovarian stimulation (P<0.001), number of oocytes retrieved (P=0.01), endometrial thickness on the trigger day (P=0.01) and fertilization method (P=0.045) between the BMI<24 kg/m2 group and BMI≥24 kg/m2 group. This evidence concerns the gene BRD2 and Infertility.