Production of (A) CCL2, (B) CCL5, (C) CXCL8 and (D) CXC9 by cultured CD4+ T cells unstimulated or stimulated with CD3/CD28 beads and IL-2 in the presence of the culture medium alone (CM), peritoneal fluid from control woman (Control PF) or peritoneal fluid from woman with endometriosis (ENDO PF). The results are shown as scatter dot plots with a median and interquartile range. Statistical significance was computed by paired non-parametric ANOVA (Friedman’s test) followed by a post hoc test. * Statistically significant from the control group at least at p < 0.05. Baseline concentration ranges of the tested chemokines (pg/mL), respectively, in Control PF and ENDO PF used for the experiments were as follows. CCL2, 16.6–198.7 and 10.12–393.2; CCL5, 2.5–9.6 and 6.0–33.9; CXCL8, 7.08–61.98 and 15.4–400.0; CXC9, 12.1–50.8 and 39.2–72.6.