Enter the date your dog was bred to estimate her due date and see which week of pregnancy she is in. Dog pregnancies typically last 63 days (about 9 weeks). The calculator also provides a week-by-week development timeline.
Canine pregnancy lasts approximately 63 days (about 9 weeks) from ovulation — much shorter than human pregnancy but compressed with the same fundamental processes: fertilization, embryo development, fetal growth, and birth. Most pregnant dogs reproduce successfully without significant intervention, but owners need to track timing for nutritional planning, veterinary care scheduling, and preparation for whelping (giving birth). Pregnancy length varies normally between 58-68 days; gestation outside this range warrants veterinary evaluation.
The reproductive process: female dogs have estrous cycles (heat cycles) every 6-12 months; estrus lasts 7-21 days during which mating occurs. Conception happens when sperm fertilize eggs in the oviduct. Embryos travel to uterus around day 7-15, implant by day 18-22. Pregnancy detection: physical examination around day 28-35; ultrasound from day 25 (most reliable); hormone tests possible from day 35; X-rays from day 45 (showing puppy skeletons, allowing counting). Owners should suspect pregnancy if mating occurred and dog shows: enlarged nipples, weight gain, behavior changes, reduced appetite (early), increased appetite (late), enlarged abdomen.
This calculator estimates due date and provides week-by-week development timeline. Use it for: planning veterinary visits, nutritional adjustments, whelping preparation, or simple tracking. Important context: this is a guide. Veterinary care during pregnancy strongly recommended — preventable issues (pregnancy loss, dystocia/difficult labor, puppy mortality) much more likely without proper care. Specific concerns: small breeds and brachycephalic breeds (English Bulldogs, French Bulldogs, Pugs) have higher dystocia rates often requiring c-sections. Large litters (>6 puppies) or single puppies may have complications. First-time mothers need closer monitoring. Veterinarian-supervised pregnancy and whelping dramatically improves outcomes for both mother and puppies. For accidental pregnancies considered unwanted: discuss options with veterinarian before significant fetal development occurs.
Female dog bred March 1, 2026. Predicted due date: May 3 (63 days later). Week-by-week: March 1-7 (Week 1): Fertilization, no external signs March 8-14 (Week 2): Implantation; subtle changes March 15-21 (Week 3): Possible appetite changes March 22-28 (Week 4): Schedule first vet visit, ultrasound to confirm March 29 - April 4 (Week 5): Visible weight gain; transition to puppy food April 5-11 (Week 6): Belly noticeably enlarged; increase food April 12-18 (Week 7): X-ray puppy count; prepare nest area April 19-25 (Week 8): Nesting behavior; vet check; prepare whelping supplies April 26 - May 3 (Week 9): Be ready for birth any day; monitor temperature Average breeding management: 2-4 vet visits, gradual food increase, prep whelping area. Most pregnancies go smoothly with minimal complications when mother in good health and proper veterinary care.
Pregnant dog at day 62. Signs to watch for impending labor: 12-24 hours before labor: - Temperature drops below 99°F (normal 101.5°F) - Restlessness, pacing - Loss of appetite - Nesting behavior (scratching at bedding, choosing private location) - Possibly vomiting - Vaginal discharge Early labor (Stage 1): - Increased panting, restlessness - Trembling - Frequent urination - Continues 3-24 hours Active labor (Stage 2): - Strong abdominal contractions - Female assumes squatting/lying position - First puppy typically born within 30-60 minutes of active straining Emergency signs (CALL VET): - Active straining for 30+ minutes without puppy delivery - More than 4 hours between puppies (after first) - Puppy stuck visible at vulva but not progressing - Bloody discharge without puppy following - Mother weak, depressed, or distressed - Gestation over 70 days Have vet on speed dial. Some breeds (English Bulldogs, French Bulldogs) almost always need c-sections; schedule in advance.
Mom delivered 6 puppies. First 24 hours critical: For mother: - Quiet, warm, dim environment - Easy access to food and water - Keep stress low (limit visitors) - Watch for excessive bleeding - Monitor for signs of milk fever (eclampsia): muscle tremors, weakness — emergency! - Mother may eat less first 24 hours; should be eating well by day 2 For puppies: - Should nurse within hours of birth - Should gain weight daily (weigh 2x/day first week) - Skin pink, no discharge from eyes/mouth - Quiet sleep between feedings - Mom licking helps stimulate elimination Week 1 priorities: - Maintain warm environment (90-95°F first week) - Monitor weight gain - Mother eating 2-3x normal calories now (lactating) - Watch for signs of mastitis (red, hot, painful mammary glands) - First vet visit scheduled Week 2-8: gradual development, eyes opening, deworming, vaccinations starting. Most puppies adopted out at 8 weeks minimum (after weaning, initial vaccinations). Older may be better for some breeds. Costs and time commitment substantial.
Use this calculator for planning prenatal care, scheduling veterinary visits, preparing for whelping, or tracking puppy development.
Pair with other pet calculators.
Important dog pregnancy considerations:
1. **Veterinary care essential.** Risks reduced dramatically with proper prenatal and birth care.
2. **Gestation typically 63 days.** Range 58-68 days normal. Outside this range needs vet check.
3. **Pregnancy detection methods vary by week.** Palpation day 25-30; ultrasound day 25+ (best early); hormone tests; X-ray day 45+ (for counting).
4. **Nutritional needs change.** Adult to puppy food transition; up to 2x calories by late pregnancy and lactation.
5. **Health checks before breeding important.** Hip/elbow X-rays, eye exams, breed-specific genetic tests responsible breeding.
6. **Brachycephalic breeds often need c-sections.** English/French Bulldogs, Pugs commonly require surgical delivery.
7. **First-time mothers need more monitoring.** Higher complication risk.
8. **Temperature drop signals labor.** Below 99°F (37.2°C) typically 12-24 hours before active labor.
9. **Know dystocia signs.** Failure to progress, prolonged labor, distressed mother — emergency situations.
10. **Cost can be substantial.** Especially with complications; budget $1,000-$5,000 including possible c-section.
11. **Post-birth puppy care 8+ weeks.** Substantial time and emotional commitment.
12. **Spay consideration after.** Eliminates future pregnancies and reduces several health risks.
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Average is 63 days; normal range is 58-68 days
Due Date
Thursday, March 5, 2026
Weeks Pregnant
36
Days Remaining
0
Stage
Past due date
| Milestone | Date / Value |
|---|---|
| Breeding Date | Thursday, January 1, 2026 |
| Estimated Due Date | Thursday, March 5, 2026 |
| Gestation Period | 63 days |
| Days Pregnant | 257 |
| Weeks Pregnant | 36 weeks, 5 days |
| Days Remaining | 0 |
| Current Stage | Past due date |
| Ultrasound (Day 25) | Jan 26 |
| X-Ray (Day 45) | Feb 15 |
| Nesting Begins (~) | Feb 26 |