BRD2 and Infertility: No difference was found among normal, mild dysbiosis and sever dysbiosis groups in terms of age, duration of infertility, infertility type, cause of infertility, basic follicle-stimulating hormone (FSH) level, number of Antral Follicle Counting (AFC), endometrial thickness on the transfer day, embryo transfer stage and optimal embryo transfer rate (P>0.05).