Figure 3.

Cumulative live birth curves for patients who underwent more than five frozen embryo transfer cycles stratified by cause of infertility. (A) The cumulative live birth rates of the groups with different causes of infertility were calculated via Kaplan–Meier analysis (the optimistic method) (A1), and the competing risk method (conservative method) (A2). (B) The adjusted hazard ratios (HRs) of the cumulative live birth rates were computed via the Cox model (B1) and the Fine–Gray model (B2). The results of pairwise log-rank comparisons among the eight groups are indicated in the figure. A significance level of P < 0.05 was considered to indicate statistical significance. The distinct letters a, b, c, d, e, f, and g above the group legends indicate statistically significant differences between groups.