Do cats in heat bleed?

Females of most species of placental mammals that are still within the reproductive stage would go through a period of fertility. This period is called estrus cycle or in heat. Generally, it is only during the estrus cycle that an intact female would accept the sexual advances of the male. A small amount of vaginal bleeding will occur if fertilization did not take place. In humans, this vaginal bleeding is called menstruation. Domestic animals like dogs, pigs and horses have small amount of bleeding while in heat. Cats would show other signs of being in heat but these animals would have no vaginal bleeding.

A female cat that was not spayed will regularly come in heat until they have passed the sexually reproductive age. Typically, the first estrus cycle would occur when the cat is four months of age. The period of being in heat widely varies but normally it would last from 4 to 6 days. The estrus cycle will end if the cat was mated. The number of daylight hours has an effect on the cat’s mating season. During the summer months, cats would come into heat every 2 to 3 weeks. Cat owners may have plans to breed the pet…others would want to confine the pet indoors while it is in heat to prevent accidental pregnancies. Cat parents would therefore need to know the tell-tale signs that the cat is in heat. Generally, cats would show the same signs of being in heat. The most obvious sign that the pet is on its estrus cycle is the call. A cat in heat is referred to as a “calling” cat. The vocalization is the queen’s or the female cat’s way of attracting the attention of potential sexual partners. The cat would be overly affectionate so that it would rub its body against humans, against other animals and even against objects. The cat would as well have the inclination to hump. However, cats would not bleed while in heat. Dogs in heat would have a small amount of vaginal bleeding but not cats.

In most mammals, the estrus cycle means the thickening of the uterine walls to prepare for the possible pregnancy. The thickened endometrium will have to be shed through the vagina if pregnancy does not occur. Placental mammals generally bleed when in heat. Cats are placental mammals but these animals do not have vaginal bleeding. Cats are induced ovulators. Unlike other mammals, the ovaries will not release eggs until the cat is mated thus the cat’s systems would not have to thicken the uterine walls with blood vessel rich tissues to prepare for the possible pregnancy. Cats as mentioned regularly go through the estrus cycle. Cats just like other mammals would have to do some spring cleaning to prepare the uterus for the next cycle. However, cats in heat do not bleed. Cats belong to the species of placental mammals that reabsorb the endometrium at the end of every estrus cycle. Given the small size of a cat’s uterus, the cervical mucus, endometrial tissues and other vaginal secretions are expected to be small and therefore can be reabsorb easily. Some cats would have vaginal bleeding but the amount is so small so that owners would not even be aware that the cat is bleeding. Cats derive benefits from this kind of set up. Absorbing the blood-rich endometrial tissues would help in the maintenance of the cat’s health. Cat owners should be gland that the pet does not bleed while in heat. Cats are prolific producers as they go through the estrus cycle more frequently ads compared to other animals. Imagine how often the owners would need to wash furniture covers and bed linens if the pet would bleed when in heat.