IL6 and endometriosis: Others factors, like estrogen receptor (ER) alpha, ERbeta, CD68, NCL-MACRO, and HAM56 and inflammatory cytokines IL-1beta, TNF-alpha, and IL-6, as well as pro-inflammatory transcription factor NF-κB are upregulated in macrophages from peritoneal fluid in patients with endometriosis [43,44].