cat pregnancy how long are cats pregnant pregnant cat cat gestation kitten birth cat pregnancy stages

How Long Are Cats Pregnant? A Complete Week-by-Week Guide

April 7, 2026 · 7 min read

The short answer: cats are pregnant for approximately 63 to 67 days, or about 9 weeks. But there’s a lot more to feline pregnancy than a simple number. Whether your cat’s pregnancy was planned or came as a surprise, knowing what to expect at each stage helps you provide the best care for the mother and her future kittens.

Use our free Cat Pregnancy Calculator to track your cat’s due date and weekly milestones.

How to Tell If Your Cat Is Pregnant

If your unspayed female cat has had access to a male cat, watch for these early signs of pregnancy:

Weeks 1-2: Almost No Visible Signs

In the first two weeks, there are virtually no external signs. Fertilized eggs implant in the uterine wall around day 12-14. You might notice your cat being slightly more affectionate than usual, but this alone isn’t reliable.

Week 3: The First Clue — Pink Nipples

Around day 15-18, a pregnant cat’s nipples become noticeably pinker and slightly enlarged. This is called “pinking up” and is often the first reliable visual indicator. The nipples also become more prominent as surrounding fur thins slightly.

Weeks 3-4: Morning Sickness

Yes, cats get morning sickness too. Some pregnant cats experience nausea and vomiting during weeks 3-4, similar to humans. This is caused by hormonal changes and usually resolves on its own. If vomiting is severe or persists beyond a few days, contact your vet.

Week 4: Veterinary Confirmation

By day 25-28, a veterinarian can confirm pregnancy through:

Abdominal palpation — a skilled vet can feel the developing embryos (about the size of grapes at this stage)
Ultrasound — can detect heartbeats and count fetuses from around day 25
Blood test — the hormone relaxin can be detected from around day 25-30

An X-ray is not recommended until after day 42, when fetal skeletons have calcified enough to be visible and countable.

Cat Pregnancy Week by Week

Weeks 1-3: Fertilization and Implantation

Eggs are fertilized within 24-48 hours of mating
Embryos travel to the uterus and implant around day 12-14
Cat behaves mostly normally
Nipples begin to pink up around day 15-18
Your role: If you suspect pregnancy, schedule a vet visit for week 4

Weeks 4-5: Rapid Growth Begins

Embryos develop from grape-size to about 1-2 inches
Morning sickness may occur and resolve
Appetite begins to increase
Belly starts to show a slight roundness
Personality may shift — some cats become more affectionate, others more withdrawn
Your role: Switch to a high-quality kitten food (it has the extra calories and nutrients she needs). Ensure clean, fresh water is always available.

Week 5-6: Visible Pregnancy

Belly is noticeably larger
Appetite increases significantly — she may eat 25-50% more than normal
Weight gain becomes obvious (total pregnancy weight gain is typically 2-4 lbs)
Kittens are about 3-4 inches long and developing fur
Your role: Avoid picking her up by the belly. Provide easy access to food, water, and litter box. Begin preparing a nesting area.

Week 7-8: Nesting Behavior

The mother starts seeking quiet, enclosed spaces — this is nesting behavior
You may be able to see and feel kittens moving in her belly
Mammary glands swell as milk production begins
Appetite may decrease slightly as the kittens press against her stomach
She may groom her belly and genital area more frequently
Your role: Set up a nesting box: a large cardboard box with low sides, lined with clean towels or blankets, in a quiet, warm location. Show it to her but don’t force her to use it.

Week 9: Preparing for Birth

She becomes restless, may pace or vocalize more
Body temperature drops by about 1°F (to ~99°F / 37.2°C) approximately 24 hours before labor
Clear or slightly bloody vaginal discharge may appear (normal)
She may stop eating 24 hours before delivery
Your role: Keep things calm and quiet. Have your vet’s phone number (and emergency after-hours number) ready. Don’t leave her alone for extended periods.

The Average Litter Size

According to data from veterinary practice, the average cat litter contains 4 to 6 kittens. However, this varies widely:

First-time mothers often have smaller litters (2-3 kittens)
Experienced mothers may have 6-8 kittens
Some breeds (Siamese, Burmese) tend toward larger litters
Single-kitten litters and litters of 10+ both occur, though uncommonly

What Happens During Birth (Labor and Delivery)

Cat labor occurs in three stages:

Stage 1: Pre-labor (6-24 hours) Contractions begin but are not visible externally. The cat is restless, may pant, vocalize, or refuse food. She’ll settle into her chosen nesting spot.

Stage 2: Active Delivery (2-6 hours for a typical litter) Each kitten is delivered in its amniotic sac. The mother breaks the sac, chews the umbilical cord, and cleans the kitten to stimulate breathing. Kittens typically arrive 15-45 minutes apart, though longer gaps (up to 2 hours) can be normal if the mother is resting between deliveries.

Stage 3: Afterbirth The placenta is delivered after each kitten (or sometimes after 2-3 kittens). The mother often eats the placenta — this is normal instinctive behavior. Count the placentas to ensure all are delivered (retained placentas can cause serious infection).

When to Call the Vet During Labor

Contact your veterinarian immediately if:

More than 2 hours pass between kittens with visible straining
Strong contractions last more than 30 minutes without producing a kitten
A kitten is visible but stuck in the birth canal for more than 15 minutes
The mother is excessively bleeding (some blood is normal, but pooling blood is not)
The mother appears exhausted, unresponsive, or in severe distress
You know there are more kittens (from an earlier X-ray) but labor seems to have stopped
A foul-smelling discharge is present at any point

According to the International Cat Care organization, about 5% of cat births develop complications that require veterinary intervention (called dystocia). Breeds with large heads relative to body size (Persian, Exotic Shorthair) have higher dystocia rates.

Nutrition During Pregnancy

Pregnant cats have significantly increased nutritional needs:

Switch to kitten food from week 4 onward — kitten food has ~25% more calories and higher protein content than adult food
Don’t restrict food — let her eat as much as she wants, especially in the last 3 weeks
Fresh water should always be available
Avoid supplements unless prescribed by your vet — over-supplementation (especially calcium) can actually cause problems
Don’t give raw food during pregnancy — the risk of Toxoplasma and Salmonella is too high

By the end of pregnancy, a cat typically eats 50-70% more than her pre-pregnancy intake. This is normal and necessary.

After Birth: First 48 Hours

Keep the room quiet and warm (85°F / 29°C for the first week is ideal for newborn kittens)
Ensure all kittens are nursing within the first 2-4 hours — colostrum (first milk) contains critical antibodies
Count kittens and placentas to make sure everything adds up
The mother should begin eating again within 12-24 hours after delivery
Schedule a vet visit within 24-48 hours to check both mother and kittens

Track Your Cat’s Pregnancy

Every pregnancy is different, but having a timeline helps you prepare for each milestone. Our Cat Pregnancy Calculator lets you enter the estimated mating date and generates a personalized week-by-week timeline with care tips for each stage.

You might also find these tools helpful:

Cat Calorie Calculator — for managing the mother’s increased nutritional needs
Kitten Feeding Guide — for when the kittens arrive and begin weaning
Cat Vaccination Schedule — for planning the kittens’ first vaccinations

Sources: International Cat Care — Pregnancy and Parturition; Cornell University College of Veterinary Medicine — Feline Reproduction; Journal of Feline Medicine and Surgery; AAHA/AAFP Feline Life Stage Guidelines.