It can be difficult to diagnose endometriosis because the symptoms can vary considerably, and many other conditions can cause similar symptoms. Your gynaecologist will ask about your symptoms, your periods and possibly your sexual activity. They may also carry out an internal pelvic exam or recommend an ultrasound scan to look for cysts in your ovaries that may have been caused by endometriosis. Endometriosis can only be confirmed with a surgical examination called a laparoscopy. This is carried out under general anesthetic. During the procedure, a small sample of tissue biopsy can be taken for laboratory testing or other surgical instruments can be inserted to treat the endometriosis.