Endometriosis is a chronic, estrogen-dependent disease that affects approximately 10% of women of reproductive age, with a peak incidence in the age range of 25-30 years.1-3 Endometriosis is characterized by the formation of endometriotic lesions outside the uterus, including the ovaries and other pelvic structures. These lesions cause a chronic, inflammatory reaction, which can lead to the formation of scar tissue and adhesions.4 Women with endometriosis frequently experience symptoms of dysmenorrhea, premenstrual pain, dyspareunia, and chronic fatigue.5 Endometriosis can also interfere with functioning of the bowel or bladder, depending on the site where endometriotic lesions develop. Up to 50% of women with endometriosis experience infertility.6 However, the clinical presentations of endometriosis can vary widely, and many affected women are asymptomatic.7 No clear relationship exists between the extent of endometriotic lesions and a woman's symptoms.