IL6 and endometriosis: IL-6 is related to: monocyte recruitment [96], in vitro polarization of pMφ to the M2 phenotype [59], the number of lesions generated in a murine model of endometriosis [96], and together with its receptor (IL-6R), has been implicated in endometrial stromal cells (ESC) growth regulatory signaling in vitro [97].