Tubal disease is a common cause of infertility. During a laparoscopy, we pass dye through the uterus and tubes to confirm the patency of the tubes. This test, however, does not evaluate the cavity of the uterus or the inside of the Fallopian tubes. Scarring of the tubes or abnormalities of the uterine cavity is two of the more common findings identified by an HSG. Such findings may explain the cause of infertility, as well as direct the therapies that may prove to be most effective.