CD14 and endometriosis: We found that the mean fluorescence intensity of CD14 + macrophages was significantly lower in endometriosis samples than that of control samples (139.6 ± 17.1 vs. 410.6 ± 92.0, P = 0.02) (Fig. 5b), indicating that the phagocytic ability of macrophages was decreased in peritoneal fluid of endometriosis.