Breeding Calculators

This chart can be a useful tool in predicting the expected date that your animal will give birth.

Please remember that it is an approximate date, and may not be the date that your animal will actually give birth, as all pregnancies are different.

Approximate due date

Enter last breeding date in format
mm/dd/yyyy:

Desired gestation in days:

Estimated due date:

Pregnancy Progress

Enter last date the animal was bred in the format mm/dd/yyyy:

NOTES

The "normal" gestation period for a full size horse is 335 to 360 days (342 average.)

The average gestation period for a miniature horse is approximately 320 days, but they should be closely watched after 300 days, or sooner depending upon any physical changes you see.

The normal gestation period for donkeys is 360 to 375 days (368 average.)

For goats, the average is 150 days.

The average gestation period for cows is 283 days.

For sheep, it's 145 days.

For cats, it's 62 days.

For dogs, it's 65 days.

Llamas average 350 days.

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Breeding Calculators