BRD2 and Infertility: There were no significant differences in maternal age, duration of infertility, type of infertility, serum AMH level, basal follicle-stimulating hormone (FSH), basal antral follicle count (AFC), and body mass index (BMI), treatment protocols, total Gn dose, serum estradiol (E2) level on the day of HCG injection, endometrial thickness on the day of HCG injection, number of eggs retrieved, and fertilization mode between the two groups (P>0.05) (Table 1).