CPP + Endo or CPP only: Laparoscopy to look for and remove endometrial tissue. This procedure is done under general anesthetic. A viewing instrument called a laparoscope is passed through an incision in the belly button to look for endometriosis. If it is found, two or more incisions are made in the abdomen for other instruments to remove the tissue. A small piece of uterine lining is also obtained for examination and research purposes.