Calculate your cat's estimated due date and see what to expect week by week. Cat pregnancy averages 65 days from mating, with a normal range of 63-67 days.
Editorially ReviewedCat gestation averages 65 days from mating. Individual queens may deliver anywhere from day 63 to day 67. Because cats ovulate in response to mating (rather than on a fixed cycle like dogs), the variation is narrower than in dogs.
What to expect in each phase.
Ultrasound, palpation, X-ray timing.
How to know queening is starting.
Cat calorie and kitten weight tracker.
Cat pregnancy is a fast, predictable process that, in healthy queens, requires very little human intervention. The total gestation period is about 9 weeks, during which kittens develop from a few cells into fully formed kittens ready to be born. Understanding the timeline helps you support your cat through pregnancy and recognize when something needs veterinary attention.
Unlike dogs and humans, cats are induced ovulators. They don't ovulate on a fixed cycle — they ovulate in response to mating. This makes the calculation more accurate than in dogs, since fertilization happens within 24-50 hours of breeding rather than at an unpredictable point days later.
The average gestation is 65 days. Queens carrying smaller litters sometimes go a day or two longer; queens with large litters often deliver slightly earlier.
| Week | Days | What's Happening |
|---|---|---|
| Week 1 | 0-7 | Fertilization. Embryos travel to uterus. No visible changes in the queen. |
| Week 2 | 8-14 | Embryos implant in uterine wall. Subtle behavioral changes may begin. |
| Week 3 | 15-21 | "Pinking" of nipples — color deepens from pale pink to rose-pink. First visible sign of pregnancy. |
| Week 4 | 22-28 | Morning sickness possible. Ultrasound confirms pregnancy. Mild appetite changes. |
| Week 5 | 29-35 | Abdomen begins to enlarge. Increased appetite. |
| Week 6 | 36-42 | Visible weight gain. X-rays now show kitten skeletons. Coat color develops on kittens. |
| Week 7 | 43-49 | Queen visibly pregnant. Increase food. Begin preparing nesting area. |
| Week 8 | 50-56 | Final development. Milk may appear. Queen seeks quiet spots. |
| Week 9 | 57-65 | Birth imminent. Temperature drops 12-24 hours before labor. |
Most cat litters average 4-6 kittens. Variation by breed and individual:
The largest recorded cat litter was 19 kittens (Burmese-Siamese cross in 1970, with 15 surviving). Most queens deliver in the typical 4-6 range. An X-ray after day 45 gives the precise count for your queen's pregnancy.
Cats prefer quiet, dark, secluded places to give birth. Start preparing the queening area at least 2 weeks before the due date:
That said: many cats give birth wherever they feel safest, which might be your closet or under your bed. Following the queen's preference is usually less stressful than insisting on the prepared spot.
Most cat pregnancies and births proceed without complications. However, call your vet immediately if:
Cat pregnancy lasts an average of 65 days from mating, with a normal range of 63 to 67 days. This is slightly longer than dog pregnancy.
Most queens deliver within a tight 4-day window around their calculated due date, because cats ovulate in response to mating (so the timing of fertilization is very predictable).
The earliest visible sign is "pinking" of the nipples — a noticeable color change from pale pink to deeper rose-pink, usually visible around day 15-18 of pregnancy.
Other early signs include behavioral changes, morning sickness around weeks 3-4, and a gradually enlarging abdomen from week 5 onward.
Ultrasound is the earliest reliable method, accurate from day 21-25 after mating. Abdominal palpation by an experienced vet can detect pregnancy from day 17-25.
X-rays show kitten skeletons clearly from day 38-45 and are best for counting expected kittens.
Cat litters average 4-6 kittens for most breeds. First-time mothers often have smaller litters of 2-3. Some cats produce litters of 8-10 kittens, particularly Maine Coons, Siamese, and Burmese.
The largest recorded cat litter was 19 kittens (Burmese-Siamese cross, 1970). An X-ray after day 45 gives an accurate count.
Signs of imminent queening include: a drop in body temperature from the normal 100-102.5°F to under 99°F about 12-24 hours before labor, restlessness and constant nesting behavior, refusal to eat 24 hours before labor, increased vocalization, and visible contractions.
Once active labor begins, the first kitten usually arrives within 30-60 minutes.
Yes — pregnant cats have significant nutritional needs. Around week 3-4, transition to a high-quality kitten food, which is calorie-dense and contains the right nutrients for fetal development.
By week 6-7, food intake should be about 50% above normal. During nursing, calorie needs can triple — free-feed kitten food during this period.