Surgery and chemotherapy are frequently used to treat ovarian cancer. In surgery, doctors remove cancer tissues.   Chemotherapy is the process of using specific drugs to shrink or destroy cancer cells. The medications can be taken orally or administered intravenously, or both. Different doctors on your medical team may provide different therapies. Gynecologic oncologists are specialists who specialize on cancers of the female reproductive system. They carry out surgery and provide chemotherapy. Surgeons are medical professionals who conduct procedures. Medical oncologists are doctors who use drugs to treat cancer (chemotherapy).