🐾 Dog Pregnancy Calculator
Enter your dog's mating date to get her estimated due date and a week-by-week guide to what's happening — and what to prepare.
How Long Are Dogs Pregnant?
Dog pregnancy (gestation) lasts an average of 63 days from the mating date, though the normal range is 58–68 days. Smaller breeds tend to deliver a little earlier; giant breeds a little later.
The pregnancy is divided into three trimesters of roughly 21 days each. Each trimester brings visible changes — from early behavioral shifts to a noticeably rounded belly by week 5, and active nesting behavior in the final weeks.
Signs Your Dog May Be Pregnant
- Decreased appetite or mild nausea in weeks 1–3
- Nipple enlargement and darkening (week 3–4)
- Increased affection or clinginess
- Visible belly rounding by week 5
- Nesting behavior and restlessness in the final week
What to Prepare
Around week 7, set up a whelping box — a quiet, warm, easy-to-clean space where your dog can give birth. Introduce her to it early so she feels comfortable.
Schedule vet checkups at week 4 (ultrasound to confirm pregnancy) and week 7–8 (X-ray to count puppies). Have your vet's emergency number ready for the final week.
When to Call the Vet Immediately
Most canine pregnancies proceed without complications, but certain signs warrant an immediate call: green or bloody discharge before labor begins, active straining for more than 30 minutes without a puppy delivered, more than 2–4 hours between puppies with visible distress, or a temperature drop below 99°F that doesn't lead to labor within 24 hours.
First-time mothers and small-breed dogs (especially brachycephalic breeds like French Bulldogs) have a higher likelihood of needing veterinary assistance during delivery. If your dog falls into either category, discuss a delivery plan with your vet well before the due date.
Want the full guide? Read: How Long Are Dogs Pregnant? A Complete Week-by-Week Guide →