Q:

How Long Does a Dog's Period Last?

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Quick Answer

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.

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Full Answer

Dogs do not have seasonal estrus cycles. Once a female puppy begins menstruating, it can take almost 2 years before there is any type of pattern with its cycle. A female dog is most fertile at the point in its cycle when the discharge is watery, usually near the end of the first week.

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