FSHB and Miscarriage: In the subgroup analysis of only RCTs, DHEA treatment significantly increased the number of antral follicle count (AFC) (weighted mean difference : WMD 1.18, 95% confidence interval(CI): 0.17 to 2.19, <i>P=</i>0.022), while reduced the level of bFSH (WMD -1.99, 95% CI: -2.52 to -1.46, <i>P</i><0.001), the need of gonadotropin (Gn) doses (WMD -382.29, 95% CI: -644.82 to -119.76, <i>P=</i>0.004), the days of stimulation (WMD -0.90, 95% CI: -1.34 to -0.47, <i>P</i> <0.001) and miscarriage rate (relative risk : RR 0.46, 95% CI: 0.29 to 0.73, <i>P=</i>0.001).