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Endometriosis is a disease in which the tissue that normally lines the inner wall of the uterus grows outside the uterus. This tissue can grow in other areas of the pelvis or abdomen, such as on the ovaries, fallopian tubes, bladder, or intestines. Affected individuals often suffer from severe pain. The consequences of endometriosis lesions are chronic inflammation, scarring and adhesions, bleeding in the abdominal cavity and infertility.