To diagnose endometriosis, a gynecologist would need to evaluate your medical history, do a complete physical examination, including a pelvic investigation, an ultrasound and in some cases even a minor laparoscopy to examine the tissue.
Keep in mind: A woman with abdominal pain, especially if it occurs just before her period, should see a physician. Early diagnosis offers the best chance of effective treatment. Be aware that is someone in your family had endometriosis, so could you.