Logistic regression was performed to determine the effects of previous CD and the presence of CSD on clinical pregnancy, multiple pregnancy, pregnancy loss, preterm birth, and live birth while adjusting for age, prepregnancy BMI, infertility duration, infertility diagnosis, endometrial preparation, basal FSH, basal LH, basal E2,the number of high-quality embryos transferred and the number of oocytes retrieved as potential confounders. The gene discussed is BRD2; the disease is Infertility.