Livestock Pregnancy Due Date Calculator
Livestock Pregnancy Due Date
Calculate expected due dates for livestock breeding programs based on species-specific gestation periods and breeding date.
Formula
Due Date = Breeding Date + Gestation Days; Due Window = Due Date +/- 10 days; Expected Pregnant = Number Bred x Conception Rate
Frequently Asked Questions
How long is a cow pregnant?
The average gestation period for cattle is 283 days or about 9.3 months. Beef breeds tend to be slightly shorter (279-283 days) and dairy breeds slightly longer (279-287 days).
What is a good conception rate for cattle?
A good first-service conception rate for cattle AI breeding is 55 to 70 percent. Natural service bulls typically achieve 60 to 75 percent. Overall pregnancy rates for a breeding season should exceed 90 percent.
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