The distribution in the percentages of (A) CD25⁺FoxP3⁺ Treg cells and (B) IL-17A⁺CD4⁺ Th-17 cells within the CD4⁺ T-cell population in the PB and PF based on the color of peritoneal lesions in the pelvis of women with revised ASRM stage I-II endometriosis. The boxes represent the IQRs and horizontal lines in the boxes represent median values. PF levels of CD25⁺FoxP3⁺ cells were significantly higher in women with red lesions than in black lesions (P < 0.01). Women with red lesions also had a statistically significant difference in (A) the levels of CD25⁺FoxP3⁺ cells between PF and PB (P < 0.05). (B) PF levels of IL-17A⁺Th17 cells in women with black lesions in the pelvis were significantly higher than in mixed lesions (P = 0.04) and modestly, but not significantly, higher than in red lesions.