Immunology of Endometriosis: Etiology and Management, a volume in the Reproductive Immunology series, provides updates on one of most common gynecological diseases, including basic science concepts and their clinical applications related to endometriosis immunology. Various immunological factors are believed to play roles in the pathogenesis of endometriosis, providing potential targets for the disease. Endometriosis is now considered to be a disease of both endocrine and immune dysregulation. However, recognition of the direct involvement of two major physiological mechanisms brings about a change of focus which might represent an interesting advance in the understanding of this disease and new focus for further research.