Ovarian cancer is a type of cancer that begins in the ovaries, part of the female reproductive system that is responsible for egg production. Ovarian cancer accounts for approximately 3% of cancers among women, but is responsible for more deaths than any other female reproductive cancer because most symptoms go undetected until the cancer has spread within the pelvis and abdomen. If detected early, ovarian cancer can often be treated successfully; later stages are much more difficult to treat and often fatal. Symptoms may include abdominal swelling, discomfort in the pelvis area, loss of appetite, and weight loss. Treatment options generally include surgery to remove the ovaries and chemotherapy and radiation after surgery.