Q:

When do dogs start to menstruate?

A:

Quick Answer

Like most mammals, female dogs undergo estrus, or a heat cycle, rather than experiencing menstruation. This usually occurs for the first time between the first nine and 12 months of the dog's life and reoccurs either biannually or annually from that point.

Continue Reading

Full Answer

The first stage of the heat cycle is called proestrus. This usually lasts nine days, although this can vary by breed. In proestrus, the dog's vulva becomes swollen and the vagina emits a reddish-brown discharge. Estrogen levels rise, although mating does not occur yet. The second stage, estrus, follows and is typified by flirtatious behavior around male dogs and the ability to successfully become pregnant once ovulation occurs. Diestrus is the third stage and follows the same pattern whether the dog is pregnant or not. Anestrus, the final stage, lasts the longest and is the dog's way of preparing for another cycle.

Learn more about Dogs
Sources:

Related Questions

  • Q:

    How often do female dogs go into heat?

    A:

    Unspayed female dogs tend to experience estrus, or go into heat, twice a year. Some breeds go into heat more often than others, and spayed dogs do not go into heat.

    Full Answer >
    Filed Under:
  • Q:

    When is the best time to breed a dog?

    A:

    Although it depends on the specific dog, female dogs are usually the most fertile around the 11th day of estrus, and typically cycle twice a year, but exact times vary by breed and location. Male dogs are fertile all the time, after reaching sexual maturity.

    Full Answer >
    Filed Under:
  • Q:

    How long does a dog's period last?

    A:

    A dog will enter her estrus cycle from one to three times per year and it lasts anywhere from 2 to 3 weeks. How often a female dog menstruates and for how long is dependent upon breed. Some breeds will have an estrus cycle only once a year while others may have a cycle three times a year.

    Full Answer >
    Filed Under:
  • Q:

    What are the top girl names for dogs?

    A:

    In 2014, the top names for female dogs were Bella, Lucy, Molly, Daisy and Maggie. The pet insurance company VPI releases a list of the most popular dog names each year, reports DogTime.com.

    Full Answer >
    Filed Under:

Explore