Veterinary Reproduction & Canine Obstetrics Standards

Dog Pregnancy Calculator

Calculate your dam's estimated whelping date (63 days standard gestation) and detailed calendar milestones for fetal heartbeats, skeletal calcification, and nesting.

Dog Pregnancy (Canine Gestation) Calculator

Veterinary Obstetrics 63-Day Canine Timeline

Standard Gestation

1. First Mating or Ovulation Date

Estimated Whelping Due Date

Dec 4, 2026

Normal Delivery Window: Nov 29, 2026 to Dec 9, 2026 (Days 58–68)

ProgressDay 28 of 63

Veterinary Tip: Schedule an abdominal ultrasound between Days 28 and 35 to verify heartbeat viability, and an X-ray on Day 45 to count skull structures.

Canine Gestation Milestone Timeline

Day 14: Embryo ImplantationOct 16, 2026

Blastocysts attach to uterine horns. Normal appetite; gentle exercise only.

Day 28: Veterinary Ultrasound WindowOct 30, 2026

Veterinarian can visualize embryonic vesicles and confirm viable heartbeats.

Day 45: Skeletal Calcification / X-RayNov 16, 2026

Puppy skulls and spines ossify. Radiographs can accurately count litter size.

Day 54: Whelping Box IntroductionNov 25, 2026

Introduce dam to nesting area. Switch to high-density puppy kibble.

Day 62: Temperature Drop (<99°F)Dec 3, 2026

Progesterone drops sharply. When rectal temp drops below 99°F, whelping starts within 12–24h.

How This Calculator Works

Unlike generic online rules-of-thumb that rely on unscientific myths, the Dog Pregnancy Calculator is strictly engineered around standards published by Veterinary Reproduction & Canine Obstetrics Standards.

All computations execute in volatile client-side browser memory in real-time, providing instant results without transmitting any personal pet data across third-party tracking servers.

Independent Veterinary Disclaimer:

This interactive tool is designed for educational guidance, preventive monitoring, and home care estimation. It does not substitute for licensed hands-on veterinary diagnosis, clinical physical exams, or emergency toxicology interventions.

Frequently Asked Questions

How long is a dog pregnant?

The average gestation period for dogs is 63 days from ovulation, though healthy normal delivery can occur anywhere between day 58 and day 68.

How can I tell when whelping is about to begin?

A drop in the dam's rectal temperature below 99°F (37.2°C)—measured twice daily during the final week—consistently indicates that labor will commence within 12 to 24 hours.

Breed Clinical Standards & Presets