The two groups were comparable in terms of maternal age, paternal age, maternal BMI, paternal BMI, basal FSH level, basal E2 level, AFC, infertility type, tubal factor, PCOS, endometriosis, other maternal factors, stimulation protocol, fertilization type, embryo transfer method, stage of transferred embryo, and number of transferred embryo (Table 1). Here, BRD2 is linked to endometriosis.