As expected, no significant between-group differences were found in post-matching analysis with regard to all baseline characteristics, including female age, BMI, infertility type and duration, gravidity, parity, basal FSH, basal LH, basal E2, AFC, initial treatment, Gn days, Gn dosage, oocytes retrieved, 2PN oocytes, embryos available for transfer as well as blastocysts available for transfer. The gene discussed is BRD2; the disease is Infertility.