Dog Pregnancy Due Date Calculator & Whelping Calendar
Calculate your pregnant dog's estimated whelping due date and generate a stage-by-stage pregnancy milestone calendar.
Dog Pregnancy Due Date Calculator
63-Day Gestational Whelping Predictor
How to Use the Dog Pregnancy Due Date Calculator & Whelping Calendar
- Enter the date of first mating / breeding.
- Get exact estimated 63-day due date range.
- View interactive gestational timeline including ultrasound window, palpation window, X-ray date, and whelping box prep.
Clinical Methodology & Formula Breakdown
Canine gestation averages 63 days (range 58 to 68 days) from ovulation, or 63 days from first breeding.
- AKC Canine Breeding & Reproduction
- Veterinary Clinics of North America: Theriogenology
Worked Clinical Example
Canine Gestational Development Timeline (63 Days)
| Gestational Day | Developmental Milestone | Action Required for Breeder |
|---|---|---|
| Day 21 - 28 | Embryos implant in uterine horns | Veterinary abdominal palpation window |
| Day 28 - 30 | Heartbeats visible on ultrasound | Veterinary ultrasound confirmation |
| Day 45 | Fetal skeletons calcify | Switch dam to nutrient-rich puppy food formula |
| Day 55 | Fetal bone calcification complete | Abdominal X-ray to count puppy skulls/spines |
| Day 60 - 62 | Dam body temperature drops below 99°F (37.2°C) | Whelping imminent within 12 - 24 hours |
Frequently Asked Questions
How long is a dog pregnant for?
Canine pregnancy lasts approximately 63 days (9 weeks).
How can a vet confirm if a dog is pregnant?
Veterinary ultrasound at day 25-30, blood relaxin hormone test at day 28+, abdominal palpation at day 28-32, or digital X-ray at day 45-55.
What is the temperature drop sign before whelping?
A dam's rectal body temperature typically drops from normal (101-102.5°F) down below 99°F 12 to 24 hours before labor begins.
When should I start feeding the pregnant dam puppy food?
Around week 5 or 6 (Day 40-45) of pregnancy to support rapid fetal bone and tissue growth.
What emergency signs mean a dam needs a C-section?
Strong labor contractions lasting over 30 minutes without a puppy, more than 2 hours between puppies, or dark green discharge before the first pup.