FOXP3 and Infertility: The number of FoxP3+ cells in eutopic endometrium of infertile women with advanced EM (0.79 ± 0.52) was marginally higher than the mild EM group (0.50 ± 0.29) and the control group (0.51 ± 0.30), although there were no statistically significant differences among these groups (P > 0.05) (Table 3).