Endometriosis is hard to find in some women. To find endometriosis in a woman a doctor may order many medical tests. These tests may be a pelvic exam and an ultrasound. When a woman has a pelvic exam the doctor will feel for lumps or scars. An ultrasound will help the doctor see cysts on the ovaries. The doctor may put a wand-shaped ultrasound probe into the vagina. A scanner may be used on your abdomen. Another test may be used. It is called an MRI. The MRI takes a picture of the inside of the body.