Basic demographic characteristics, such as age, BMI, age of menarche, duration of infertility, abortion number, infertility aetiology, basic hormone levels (FSH, LH, E2, T, P, AMH, INHB, and DHEAs) and AFC, were not significantly different (P >0.05) between the DHEA and control groups (Table 1). The gene discussed is BRD2; the disease is abortion.