Gestation length by animal
| Animal | Average pregnancy | Normal window | Babies called |
|---|---|---|---|
| Dog | 63 days | 58–72 days | Puppies |
| Cat | 63–66 days | 63–66 days | Kittens |
| Goat | 150 days | 146–155 days | Kids |
| Cow | 283 days | 273–293 days | Calf |
Windows are counted from the breeding or mating date. Cow window is a 10-day planning buffer either side of 283 days.
How to use these calculators
- Pick your animal above.
- Enter the breeding or mating date. If your vet gave you an ovulation or LH date (dogs), choose that option for a more accurate result.
- Get your timeline — the due date, how far along she is today, and when to book checks and get ready. Add it to your calendar or print it.
Frequently asked questions
How does an animal due date calculator work?
It adds the animal's average pregnancy length to the date of breeding or mating. For example, a goat bred on 1 March is due about 150 days later. We also show the normal window around that date and a timeline of checks and signs.
How accurate are the due dates?
They are estimates. Breed, age, litter size and the exact day of ovulation all shift the real date by a few days, which is why every result shows a normal window, not just one day. A vet can narrow it down with blood tests or ultrasound.
Where does your information come from?
From veterinary references and agricultural university extension services, such as the Merck Veterinary Manual and Oklahoma State University Extension. Each calculator lists its sources at the bottom of the page.
Is this a substitute for a vet?
No. These tools help you plan and know what to watch for. Always contact your veterinarian about your animal's health, and straight away if something seems wrong during pregnancy or birth.