Introduction -- Predisposing and protective factors of endometriosis -- Theories on endometriosis -- Oxidative stress and endometriosis -- Role of iron in the pathogenesis of endometriosis -- Role of environmental pollutants in endometriosis -- Endometriosis and ovarian cancer -- Endometriosis: impact on quality of life -- Diagnosis of endometriosis -- Management of endometriosis -- Concluding remarks.