Caused by the growth of malignant cells in the uterus, causing tumors and the spread of the cancerous cells to other parts of the body. You may be more at risk for ovarian cancer if you are older, have a family history of ovarian or breast cancer or if you never had a child or had a child later in life. Some symptoms include increased urination, bloating, lower back pain, pelvic or abdominal pain and pain during intercourse.