The reproductive tract of a female cat includes two ovaries and a two-horned uterus. Female cats not used for breeding should be spayed (surgical removal of the uterus and hormone-producing ovaries) to prevent nuisance behaviors, cat overpopulation, cancers, and potentially life threatening infections. Spaying your cat prior to the onset of the first estrous cycle significantly decreases your pet’s chances of developing mammary cancer later in life.