To describe the difference in patient reported outcomes after conservative treatment in comparison to radical rectal surgery in patients with deep endometriosis infiltrating the rectum (up to 15cm from the anus with at least involvement of the muscularis layer) and to determine predictors for radical surgery.

Inclusion Criteria:

• Age: 18 - 45 years (both inclusive)
• BMI <35
• Complaining of infertility and/or pain
• Deep endometriosis infiltrating the rectum on at least one imaging technique up to 15 cm from the anus and involving at least the muscularis layer in depth

Exclusion Criteria:

• Refusal of bowel resection/stoma
• History of laparotomy for endometriosis
• (history of) Hysterectomy
• Suspected pelvic malignancy
• Pregnancy
• Impossibility for postoperative follow-up in our hospital

Women scheduled for a multidisciplinary laparoscopic surgery for rectal endometriosis.