Calculate your dog's due date (whelping date) from the breeding/mating date. Average canine gestation is 63 days.
Canine gestation averages 63 days from ovulation. Week 3–4: embryos implant. Week 5: puppies develop features. Week 7–8: puppies visible on X-ray. Week 9: whelping. Signs of impending labor: temperature drop below 99°F, nesting behavior, restlessness.