How Long Are Dogs Pregnant?
Dogs are pregnant for about 63 days on average - roughly nine weeks, or two months. In practice the range is around 57 to 65 days from breeding, and it is the same for every breed and size. Pregnancy runs in three stages of about three weeks each, and a sharp drop in body temperature below about 100°F usually means labour will start within 24 hours.
On average, dogs are pregnant for about 63 days - roughly nine weeks, or two months. The gestation period is remarkably consistent across dogs: it is the same whether you have a Chihuahua or a Great Dane, young or old.
The exact range
While 63 days is the textbook average, normal delivery can happen anywhere from about 57 to 65 days after mating. Part of the reason the window looks wide is that the day of mating isn’t always the day of conception - sperm can survive for several days inside the female before fertilisation. A vet can pin down the timing far more precisely by measuring from ovulation (using progesterone testing) rather than from the date of mating.
The three stages of dog pregnancy
Pregnancy is usually divided into three stages of roughly three weeks each:
| Stage | Days | What is happening |
|---|---|---|
| First | 1–21 | Little visible change. Some dogs have mild “morning sickness” or a dip in appetite around weeks 3–4. |
| Second | 22–42 | The belly starts to fill out, weight gain becomes noticeable, and the nipples enlarge and darken. |
| Third | 43–63 | The belly is clearly large, the mammary glands swell, milk may leak, and the dog starts nesting. |
Signs your dog is pregnant
- Increased appetite (after any early-pregnancy dip) and gradual weight gain
- Enlarged, darker nipples
- A firmer, fuller abdomen from around week 4–5
- Calmer or more affectionate behaviour, or the opposite - some become withdrawn
- Nesting behaviour in the final week
The reliable way to confirm pregnancy is a vet visit: ultrasound from around day 25–30 can confirm it and check the puppies’ heartbeats, and an X-ray after about day 45 can count the skeletons so you know how many puppies to expect.
How to tell labour is close
The clearest early sign is a drop in body temperature. A dog’s normal temperature is about 101–102.5°F; when it falls below roughly 100°F, labour usually begins within 24 hours. You may also see restlessness, nesting, refusal of food, and a clear vaginal discharge as whelping starts.
Looking after a pregnant dog
- Book a vet visit early to confirm the pregnancy and plan care.
- Keep exercise gentle and regular, easing off in the final weeks.
- Switch to a high-quality puppy or specially formulated food in the second half of pregnancy, as directed by your vet, to meet the higher energy demand.
- Prepare a quiet, warm whelping area a week or two before the due date.
Contact your vet promptly if a pregnant dog is straining for more than 20–30 minutes without producing a puppy, seems very unwell, or goes well past day 65 without any sign of labour.
References
- Dog Pregnancy: Signs, Care, and Preparing for Puppies - American Kennel Club
- Dog Pregnancy: Signs and What You Can Do To Help - PetMD
- Pregnancy in Dogs - VCA Animal Hospitals
This article is general information, not veterinary advice. Always work with your vet through a dog’s pregnancy and whelping.
