Dog Heat Cycle Chart at Chart

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Dog Heat Cycle Chart. The vulva will usually be swollen with a blood tinged. A typical heat period lasts roughly two to four weeks, with a pregnancy or resting phase following the estrus period.

Length Of The Heat Cycle In Dogs
Length Of The Heat Cycle In Dogs from www.thesprucepets.com

If your female dog is not spayed, she will go into heat roughly twice per year. Each dog is different, and heat averages two to three weeks. First estrus tends to be irregular.

Length Of The Heat Cycle In Dogs

Normally they are breedable on approximately day 12 to day 18, but they can remain in heat till day 21. The beginning progesterone levels are typically less than 1.0 ng/ml until the day before the lh surge. However, if you look closely you will see that their vulva is swollen and is releasing a bloody discharge. When young dogs first begin to cycle, it is normal for their cycles to be somewhat irregular.