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Dog Pregnancy Calculator
Calculate your dog's due date and whelping timeline based on mating date.
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Standard gestation period is approximately 63 days.
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Estimated Due Date
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Dog Pregnancy & Whelping Calculator
Expecting puppies? Our Dog Pregnancy Calculator helps you estimate when your dog will give birth (whelp). Knowing the due date is crucial for preparing a whelping box, scheduling veterinary checkups, and being ready for the arrival of the litter.
Simply enter the date your dog was bred, and the calculator will give you the estimated due date based on the average 63-day canine gestation period, plus a range of possible delivery dates.
Week-by-Week Dog Pregnancy Timeline
| Week | Days | What's Happening | What to Do |
|---|---|---|---|
| Week 1 | 0-7 | Fertilization occurs, cells begin dividing | Normal exercise and diet |
| Week 2 | 8-14 | Embryos travel to uterus | No changes needed yet |
| Week 3 | 15-21 | Embryos implant in uterine wall, nipples enlarge | Watch for morning sickness |
| Week 4 | 22-28 | Fetuses develop, vet can detect via ultrasound | Schedule vet ultrasound (day 25+) |
| Week 5 | 29-35 | Organs and bones forming, weight gain visible | Increase food by 25% |
| Week 6 | 36-42 | Puppies' skeletons calcifying, belly noticeably larger | Switch to puppy food for extra calories |
| Week 7 | 43-49 | Puppies developing fur, X-ray can show count | Get X-ray, set up whelping box |
| Week 8 | 50-57 | Puppies in final position, milk production starts | Reduce exercise, monitor temperature |
| Week 9 | 58-65 | Ready for birth — could go any time | Take temperature 2x daily, watch for labor signs |
Signs of Labor in Dogs
Knowing the signs of imminent labor helps you be prepared and know when to call your veterinarian:
- Temperature drop — Body temperature falls below 100°F (37.8°C) approximately 12-24 hours before labor begins. Take rectal temperature twice daily in the last week.
- Restlessness and nesting — Your dog may pace, dig at bedding, or repeatedly rearrange blankets in the whelping box.
- Loss of appetite — Most dogs refuse food 12-24 hours before labor.
- Panting and shivering — Visible trembling and heavy breathing indicate labor is approaching.
- Vaginal discharge — Clear or slightly mucous discharge is normal. Green or dark discharge before the first puppy may indicate a problem — call your vet immediately.
Average Litter Size by Breed
| Breed Size | Example Breeds | Avg. Litter Size |
|---|---|---|
| Toy / Small | Chihuahua, Pomeranian, Yorkshire Terrier | 1–4 puppies |
| Medium | Beagle, Bulldog, Cocker Spaniel | 4–8 puppies |
| Large | Labrador, Golden Retriever, German Shepherd | 6–10 puppies |
| Giant | Great Dane, Mastiff, Saint Bernard | 8–15 puppies |
Whelping Box Preparation Checklist
- Size — The box should be 1.5x the length of your dog, with sides about 6 inches higher than the dog when lying down.
- Location — Quiet, warm area away from drafts, other pets, and household traffic.
- Bedding — Washable blankets or newspaper that can be changed frequently during and after birth.
- Heat lamp — Newborn puppies cannot regulate body temperature. Keep the area at 85-90°F for the first week.
- Supplies — Clean towels, dental floss (for cords), scissors, a scale, and your veterinarian's emergency number.
💡 Pro Tip: Introduce your dog to the whelping box at least 1-2 weeks before the due date. Let her sleep in it and get comfortable — this increases the chance she'll choose to give birth there rather than in your closet!
Frequently Asked Questions
How long is a dog pregnant?
The average canine gestation period is approximately 63 days (about 9 weeks) from the date of ovulation. However, since the exact date of ovulation is difficult to determine without veterinary progesterone testing, pregnancies calculated from the mating date can appear to last between 58 to 68 days. This variation is normal and depends on when fertilization actually occurred.
Can a dog be pregnant for 70 days?
It is possible if the calculation is based on the first mating date, as sperm can survive in the reproductive tract for several days before fertilization occurs. However, if pregnancy extends beyond 65-67 days from the estimated conception date, you should consult a veterinarian immediately as this could indicate complications.
How many puppies will my dog have?
Litter size varies significantly by breed. Large breeds (Labradors, German Shepherds) typically have 6-12 puppies, medium breeds (Beagles, Bulldogs) have 4-8 puppies, and small breeds (Chihuahuas, Pomeranians) usually have 1-4 puppies. The only reliable way to know the exact count is through a veterinary X-ray after day 45 of pregnancy.
What are the first signs of dog pregnancy?
Early signs of dog pregnancy (weeks 1-3) include slight decrease in appetite, mild lethargy, and nipple enlargement. By weeks 4-5, you may notice weight gain, increased appetite, and a firmer abdomen. Morning sickness (occasional vomiting) can occur around week 3-4. A veterinarian can confirm pregnancy via ultrasound as early as day 25.
When should I set up a whelping box?
Set up the whelping box at least 1-2 weeks before the expected due date (around day 50-55) so your dog has time to get comfortable with it. Place it in a quiet, warm area away from drafts and household traffic. The box should be large enough for the mother to stretch out fully, with sides low enough for her to step over but high enough to contain the puppies.
What are signs that my dog is about to give birth?
Key signs of imminent labor include: body temperature dropping below 100°F (37.8°C) approximately 12-24 hours before labor, restlessness and nesting behavior, loss of appetite, panting or shivering, and clear vaginal discharge. Active labor typically begins within 24 hours of the temperature drop.