Once neutrophils reach the peritoneal fluid and ectopic endometriosis lesions, they participate in the inflammatory process of endometriosis by secreting pro-inflammatory cytokines like IL-8, VEGF, and C-X-C motif chemokine ligand 10 (CXCL-10), all of which enhance the progression of the disease [80-82]. Here, CXCL8 is linked to endometriosis.