Dog pregnancy at a glance
| Average pregnancy length | About 63 days (9 weeks) from ovulation |
|---|---|
| Normal range from first breeding | 58–72 days — wide, because sperm can survive and she may be bred before ovulating |
| From LH surge (vet test) | 64–66 days — the most accurate way to predict the date |
| Pregnancy confirmed by | Ultrasound from about day 28–30; relaxin blood test from about day 27–30 |
| Puppy count | X-ray from about day 55 |
| Sign birth is near | Rectal temperature drops (to around 98–100 °F / 36.7–37.8 °C) about 8–24 hours before whelping |
Why the breeding date gives a wide window
A female dog can accept a male for several days, and sperm can survive inside her for days before she ovulates. That is why a due date counted from the breeding date has a wide normal range of 58–72 days. If your vet has measured her progesterone or LH surge, choose that option above for a much tighter estimate.
Signs your dog is about to give birth
- Temperature drop: most dogs drop to around 98–100 °F (36.7–37.8 °C) roughly 8–24 hours before whelping. Taking her temperature twice a day in the last week helps you spot it.
- Appetite loss around days 61–62.
- Restlessness: nesting, digging, pacing, panting or shivering.
Frequently asked questions
How long are dogs pregnant?
About 63 days from ovulation, or roughly 9 weeks. Counted from the first breeding date, normal births happen anywhere from about day 58 to day 72.
Can I tell if my dog is pregnant at home?
Not reliably in the first few weeks — many dogs show no signs until about week 4 or 5. A vet can confirm pregnancy with ultrasound from about day 28–30 or a relaxin blood test from about day 27–30.
When can a vet count the puppies?
An X-ray from about day 55 shows the puppies' skeletons, so the vet can count them. Knowing the number helps you tell when the last puppy has been born.
Does breed or litter size change the due date?
Yes, slightly. Breed, the number of litters she has had and litter size can all shift the timing by a few days, which is why we show a window rather than a single day.
Sources
- Merck Veterinary Manual – Whelping and Queening in Dogs and Cats
- American Kennel Club – How Long Are Dogs Pregnant?
Last reviewed November 2026. This calculator gives estimates for planning only and is not veterinary advice.