How long are dogs pregnant? Timeline week by week
Dog pregnancy lasts about 63 days from ovulation, usually 62–64 days. Counted from the day of mating, it can be anywhere from 58 to 72 days, because mating and conception don’t always happen on the same day.
Why the due date is hard to pin down
The Merck Veterinary Manual gives a gestation of 62–64 days when counted from ovulation, but 58–72 days when counted from breeding, because sperm can survive in the reproductive tract for several days. If your vet tracked hormone levels (progesterone or the LH surge), they can predict the due date much more precisely.
Dog pregnancy timeline
| When | What’s happening |
|---|---|
| Weeks 1–3 | Embryos travel to the uterus and implant at around day 15–18. Most dogs show no outward signs. |
| Week 4 (days 22–30) | Fetuses take shape. A vet may feel them by gentle palpation, and an ultrasound can show pregnancy and heartbeats. |
| Weeks 5–6 | Rapid growth: eyelids, toes and claws form. Appetite and belly size start to increase. |
| Week 7–8 | Coat and skeleton develop. From about day 55, an X-ray can count the puppies. |
| Week 9 | Nesting begins around days 58–62. Puppies move into position for birth. |
How to tell if your dog is pregnant
- Ultrasound — the method of choice; reliable from about day 28.
- Relaxin blood test — usually positive from about 3–4 weeks after breeding.
- X-ray — from about day 55; the best way to know how many puppies to expect.
Weight gain, bigger nipples and nesting can also happen in a false pregnancy, so only a vet can confirm it.
Feeding a pregnant dog
Keep food amounts the same for the first two-thirds of pregnancy. Overfeeding early is a common mistake. In the last third, food usually needs to increase, and many vets recommend switching to a growth (puppy) diet. Don’t add calcium supplements unless your vet advises it.
When to call the vet during labor
- No labor within 24 hours of a drop in body temperature.
- Strong contractions for 30–60 minutes with no puppy.
- More than two hours between puppies.
- Green or bloody discharge before the first puppy.
- Trembling, collapse or obvious exhaustion.
- Pregnancy going past 64 days after the last mating with no sign of labor.
Frequently asked questions
How long are dogs pregnant in weeks?
About nine weeks.
Can a dog be pregnant for 70 days?
Counting from the first mating, yes — the normal range from breeding is 58 to 72 days. If you know the ovulation date and pass 64 days without labor, call your vet.
How many puppies will my dog have?
It varies with breed and size. An X-ray after about day 55 is the most accurate way to count them.
Do small dogs have shorter pregnancies?
Not by much. Gestation length is similar across breeds, though litter size can slightly affect timing.
Sources
This article is general information, not veterinary advice. Every pet is different — for questions about your own pet’s health, talk to your veterinarian.
