In both women with and without endometriosis, the relative abundance of CD14+low cells was significantly lower compared with that of CD14+high cells (2.5 times for controls, p = 0.0002 and 1.7 times for endometriosis, p = 0.0005 respectively, Fig. 1a, bottom and Supplementary Fig. 1a, middle). Here, CD14 is linked to endometriosis.