BRD2 and Infertility: As shown in Table 1, there were no significant differences in baseline characteristics between the two groups (P > 0.05), including maternal age, BMI, duration of infertility, type of infertility, indications for IVF, antral follicle count, serum thyroid stimulating hormone (TSH), AMH, follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol, progesterone, testosterone and prolactin levels.