how long is a dog's period?

Answer 1

About 3 weeks.

Answer 2

A female dog has a cyle of 21 days. The first 8-10 days she will not breed, after that some will breed till the end and others will only breed over a 4-6 day period. Bitches usually come into season once every 6-12 months. If this dog isn't a registered pure bred and you are breeding respocibly, then I would suggest getting her steralized. She will have no side effects and live a happier, healthier life.

Answer 3

Understand a heat cycle... Then just spay her so you wont have to worry about it.

There are four stages in the canine heat cycle (estrous) in dogs:

Proestrus: Getting Ready

Proestrus is the time when a *****'s reproductive tract is preparing for the possibility of breeding with a male dog. This lasts an average of about 10 days, but can be as little as 3 or as long as 3 weeks. Its onset is usually accompanied by a bloody discharge from the vagina as well as swelling of the vulva. A ***** that cleans herself can be hard to detect for a few days, so it is a good practice to lift her tail and check every day. This seems strange, but will become habit in time, and is the only way to be sure you have got the first day of her heat cycle.

Dogs will become attracted to a female during proestrus, but she’ll show little interest in the male at this stage. The walls of the *****'s reproductive tract thicken during proestrus and you can use a cotton swab to collect epithelial cells (cells from the uppermost layer of the skin) from the reproductive tract of the *****, to view under a microscope. This is used to see how long she is into the cycle.

The epithelial cells size and shape will change as the estrous cycle progresses. In the anestrus stage of the canine heat cycle, the epithelial cells of the reproductive tract are small and round with a dark spot in the middle (the nucleus). As proestrus ensues, these cells become larger, more angular and have little staining of the nucleus and they increase in number. Under a microscope, many red blood cells and some white blood cells, which were not present in the previous stage, can be seen in proestrus.

Hormone levels also change during proestrus. Although estrogen levels rise in anestrus, they stay relatively low during the early part of proestrus. As the ***** enters the later stages of proestrus, however, estrogen levels continue to rise, reaching their peak near the end of this stage. Estrogen begins to fall as progesterone levels begin to rise. Progesterone remains high throughout the next two stages of the heat cycle, and is the hormone routinely used to test for when a ***** is about to ovulate and, therefore, should be bred.


Estrus: She's Ready

Estrus is the second stage of the estrous cycle. It also lasts an average of 9 to 11 days, but can vary from 3days to 3 weeks. This is the time when the ***** accepts the male dog for breeding. During this stage, she sometimes exhibits a behavior called "flagging." This involves the ***** standing in one place, maybe shuffling her feet, while at the same time, lifting her tail to allow the male to sniff her hind end.

During estrus, the vaginal discharge decreases, becoming less bloody in many dogs. The discharge will become a straw olor. None of the small round epithelial cells that were typical of early proestrus can be seen under a microscope in estrus. Rather, a lot of angular platelets can be seen, stacked on top of each other.

The progesterone level continues to rise. Near the onset of estrus, there is a very short rise in another sex hormone, luteinizing hormone (LH). Once this has peaked, ovulation usually occurs within 24 to 48 hours. The prime time to breed the dog is approximately 2 days after ovulation or 4 days after the LH surge.


Diestrus: Progesterone Dominates

The next stage of the heat cycle, diestrus, is considered the period when progesterone dominates the hormone scene. Diestrus lasts from 60 to 90 days in a dog that doesn’t become pregnant or approximately 63 days in a dog that does become pregnant.

In diestrus, the vaginal discharge will stop and the epithelial cells of the reproductive tract quickly appear small and round again. White blood cells can be seen in very high numbers during the first few days of diestrus. This is normal, since their function is to clean up the cellular debris left behind by estrus.


Anestrus: The Final Stage

The final stage of the heat cycle is called anestrus. Anestrus lasts an average of 4 to 5 months. During this time the sex hormones are at very low levels, although they do continue to have small rises and declines throughout this stage. If a swab of the reproductive lining is taken and viewed under a microscope at this stage, very few epithelial cells can be seen.

Answer 4

Patty Cakes is right, about 3 weeks.