From the beginning of January 2006 patients also completed preoperative questionnaires considering visual analogue scales (VAS) for pain symptoms (dysmenorrhea, deep dyspareunia, pain with urination and defecation, chronic pelvic pain, pain with ovulation), functional bowel and urinary symptoms, and 15D Quality of Life questionnaire, McCoy sexual functioning questionnaire, EHP-5 Short Form Endometriosis Profile questionnaire. Same questionnaires will also be completed six months, one year, two years, four years, and six years after the endometriosis operation. Follow-up questionnaires also contain questions concerning complications related to surgery, endometriosis recurrence, pregnancies, and infertility treatments.