Endometriosis occurs when the tissue that is similar to the endometrial lining of your uterus grows outside the uterus (called implants or lesions). Endometriosis effects approximately 10% of reproductive age women and can cause debilitating pain and sometimes infertility.There are two common surgery options: endometriosis resection and hysterectomy. Management of this disease is complex and surgical excision is among the most complex and difficult of gynecologic surgeries. Dr Heegaard has been a leader in treatment of this condition and is among the busiest Endometriosis surgeons in the Midwest. He has operated on patients who have sought his expertise from all parts of the United States.