Animal Gestation Calculator
Calculate accurate due dates for your animals based on scientific research
Select an Animal
Cattle
283 days
Cattle gestation varies by breed, with dairy cattle averaging 275-282 days and beef breeds 283-294 days.
Dog
63 days
Dog gestation averages 63 days from ovulation, or 58-68 days from breeding date. LH surge testing is needed for precise timing.
Goat
150 days
Goat gestation averages 150 days (5 months), varying by breed and number of kids.
Sheep
147 days
Sheep gestation averages 147 days (about 5 months), varying slightly by breed and number of lambs.
Horse
340 days
Horse gestation averages 340 days (11 months), with normal range 320-370 days. Mare gestation can vary significantly.
Pig
114 days
Pig gestation is famously known as '3 months, 3 weeks, 3 days' (114 days). Very consistent across breeds.
Rabbit
31 days
Rabbit gestation averages 31 days. Does can breed again immediately after giving birth.
Cat
64 days
Cat gestation averages 63-65 days. Queens may show 'pinking' of nipples around day 21.
Deer
201 days
White-tailed deer gestation averages 201 days. Timing ensures fawns are born in spring.
Llama
350 days
Llama gestation averages 350 days (11.5 months). Most births occur during daylight hours.
Alpaca
345 days
Alpaca gestation averages 345 days. Like llamas, typically give birth in the morning.
Ferret
42 days
Ferret gestation is short, averaging 42 days. Jills need close monitoring as due date approaches.
About Gestation Calculators
Our gestation calculators are based on peer-reviewed scientific research and veterinary sources. Each calculator is optimized for the specific gestation period of the animal, providing accurate due date predictions and important pregnancy milestones.
Why Accurate?
All calculations are based on scientific data from NIH, veterinary journals, and agricultural universities. We provide breed-specific variations and detailed references for each animal.