Enter the mating date to get your cat's estimated due date, whelping window, and a complete week-by-week development timeline. Canine gestation is approximately 65 days from conception.
~65 Day Gestation Week-by-Week TimelineBased on average 65-day feline gestation
🩺 General estimate only. Actual gestation ranges from 63-69 days. Consult a licensed veterinarian for pregnancy monitoring and whelping support.
Enter the mating date above to generate a personalized week-by-week timeline.
Canine pregnancy (gestation) typically lasts 63-69 days from the date of ovulation, with an average of 63 days. Diagnosis is most accurate through veterinary ultrasound, which can detect heartbeats from around day 25. X-rays after day 45 can count the fetuses more reliably.
In the first three weeks, signs may be subtle or absent. Weight gain and behavioral changes typically become more apparent in weeks 4-6. By week 7-8, the abdomen will be visibly enlarged and you may be able to feel movement. The mother should be transitioned to a high-quality puppy food (or food formulated for "all life stages") during the second half of pregnancy to support the growing pups.
Signs of approaching labor include nesting behavior, restlessness, and a drop in rectal temperature to below 99°F (37.2°C), typically 12-24 hours before whelping. Have your veterinarian's emergency number ready. If a pup is stuck for more than 30 minutes, seek immediate veterinary care. See also: Cat Pregnancy Calculator.
This calculator estimates your cat's due date and tracks kittening milestones based on the standard 65-day feline gestation period documented in veterinary obstetrics literature.
Feline gestation typically lasts 63 to 67 days, with an average of 65 days from the date of conception. Some breeds, particularly Siamese, may carry slightly longer. Knowing the approximate mating date helps you prepare for the kittening day and schedule veterinary check-ups during the pregnancy.
Early signs include a slight weight gain around week 3, pinkening of the nipples (called pinking up) around day 15 to 18, and increased appetite. By week 4, a veterinarian can often palpate developing kittens. Later signs include a visibly enlarged abdomen, nesting behavior, and decreased activity in the final week before delivery.
Average litter size ranges from 4 to 6 kittens, though first-time mothers often have smaller litters of 2 to 3. Some breeds like Siamese tend toward larger litters. Litter size can be confirmed through veterinary ultrasound around day 25 or radiographs after day 45 when fetal skeletons become visible.
Pregnant cats need increased calories and nutrition, especially in the final three weeks. Switch to a high-quality kitten food, which provides the extra protein, fat, and calcium needed for fetal development. Feed smaller, more frequent meals as the growing uterus compresses the stomach. Fresh water should be available at all times.
Schedule an initial check-up as soon as you suspect pregnancy. A mid-pregnancy ultrasound around day 25 to 30 confirms viability and litter size. A final visit around day 55 to 60 allows the vet to assess fetal positioning and discuss delivery plans. Contact your vet immediately if you notice discharge, prolonged straining without delivery, or if more than 24 hours pass between kittens.