Ovarian cancer is the growth of cells that forms in the ovaries which can multiply quickly and can invade and destroy healthy body tissue. Pay attention to your body, and know what is normal for you. If you have unusual vaginal bleeding, see a doctor right away. If you have any of the other signs for two weeks or longer and they are not normal for you, see a doctor. They may be caused by something other than cancer, but the only way to know is to see a doctor.