Ovarian cancerBy Mayo Clinic staff
Original Article: http://www.mayoclinic.com/health/medical/IM03917
Ovarian cancer is a type of cancer that begins in the ovaries. Women have two ovaries, one on each side of the uterus. The ovaries — each about the size of an almond — produce eggs (ova) as well as the hormones estrogen, progesterone and testosterone.