Pelvic adhesions can arrive from silent infections (Chlamydia, overt infections, gonorrhea), or from endometriosis, appendicitis, pelvic inflammatory disease, or various pelvic operations. Pelvic infections may result in adhesions alone or adhesions with blockage of the tube (hydrosalpinx). When only adhesions are present without blockage of the tube, division of these adhesions by laparoscopic microsurgery is the most successful means of restoring fertility. Pregnancy rates of 60 to 70 percent within the year can be expected after such treatment and represents the most successful fertility surgery next to tubal anastomosis. At the Reproductive Center, this operation is performed using the KTP laser with ultramicro instrumentation so that the operation is very refined thus minimizing the risk of further adhesions forming because of the operation.