“…In contrast, cytokines, including IL-1a, IL-1b, and IL-6, were found elevated in women with advanced stage endometriosis but were unchanged in women with mild endometriosis, compared with women without endometriosis. 42 A plausible explanation for such a variation may be the result of macrophage activity and secretions during inflammation, which can vary between proinflammatory and prorepair throughout the various stages of disease. 36,39 In mice, a recent study found increased levels of neutrophils and inflammatory cytokines G-CSF, TNFa, IL-6, and VEGF, in the peritoneal fluid during in the early stages (days 1-3) of endometriosis development.…”