Dog Pregnancy Calculator
Enter the breeding date to see the expected whelping date and a week-by-week pregnancy timeline. Canine gestation averages 63 days, with a normal range of 58-68 days from breeding.
How dog pregnancy works
Canine pregnancy is short — about nine weeks from breeding to birth. Inside the mother, embryos implant around days 14-18, fetuses become recognizable on ultrasound by day 25, and skeletal development is visible on X-ray after day 45 (which is also the most reliable way to count puppies before whelping).
Pre-whelping checklist
- Set up a quiet whelping box in a low-traffic area at least one week before due date.
- Have your vet’s after-hours emergency number written down.
- Take the mother’s rectal temperature twice daily starting day 55 — a drop below 99°F (37.2°C) typically signals labor within 24 hours.
- Switch to a high-quality puppy food during the last trimester for extra calories and calcium.
- Keep a "whelping kit" ready: clean towels, dental floss (umbilical ties), unwaxed dental floss, bulb syringe, scale, heating pad on low.
When to call your vet immediately
- Active labor for 30+ minutes with no puppy delivered.
- More than 2 hours between puppies once labor has started.
- Green or bloody discharge before any puppies are born.
- Mother is weak, vomiting persistently, or has a temperature over 103°F.
- Estimated due date passed by 3+ days with no labor signs.
Frequently asked questions
How long is a dog's pregnancy?
Average canine gestation is 63 days from ovulation, but the range from breeding date can be 58-68 days because sperm survives several days inside the female and eggs aren't fertilized immediately. Most vets target the 63-day mark from the first successful breeding.
When can I confirm pregnancy?
Ultrasound from day 25-30 detects heartbeats. A vet palpation between days 28-32 can identify embryos. X-ray after day 45 shows skeletons and is the most reliable way to count puppies before whelping.
What are signs my dog is close to whelping?
A drop in body temperature below 99°F (37.2°C) typically happens 12-24 hours before labor. Other signs: nesting behavior, loss of appetite, restlessness, and visible contractions.
Should I be present during whelping?
Yes — most healthy dogs whelp without help, but problems can develop fast. Have your vet's emergency number ready. Call immediately if labor stalls more than 2 hours between puppies, or if the mother strains for more than 30 minutes without producing a puppy.
Already thinking about names?
Browse puppy names, boy puppy names, or girl puppy names. For a litter, our pair names page gives ready-made matching sets.