How long is a cat pregnant?
Feline gestation averages 65 days from successful mating, with a typical normal range of 63 to 67 days. Anywhere within that window is considered routine. Cats are induced ovulators — meaning ovulation is triggered by mating itself, rather than occurring on a fixed cycle as in dogs — so if you witnessed the mating, your dating is usually accurate to within a day or two.
Queens (intact female cats) can come into heat repeatedly through the breeding season, sometimes mating with more than one tom across several days. Because of this, kittens in a single litter can occasionally have different fathers (a phenomenon called superfecundation). The due date is calculated from the most recent mating that produced ovulation.
Signs of pregnancy in cats
- Days 15–21: "Pinking up" — nipples become noticeably pinker and slightly enlarged. Often the earliest visible sign.
- Days 21–30: Pregnancy can be confirmed by veterinary palpation and abdominal ultrasound.
- Days 30–45: Visible weight gain and a slowly enlarging abdomen. Increased appetite. Mild morning sickness possible.
- Days 45–55: X-ray can count fetal skeletons, which is the only reliable way to know the litter size before birth.
- Days 55–65: Nesting behaviour intensifies. The queen may seek out quiet, hidden spots. Body temperature drops below 99°F (37.2°C) about 24 hours before labour.
Prenatal care for pregnant cats
Schedule a vet check around day 21–28 to confirm pregnancy and screen for any concerns. From the third week onward, gradually transition the queen onto a high-quality kitten food, which provides the elevated calories, protein, calcium, and DHA she needs to support fetal development and lactation. By the final two weeks of pregnancy, she may be eating 1.5× her pre-pregnancy intake. Provide constant access to fresh water.
Avoid all non-essential medications, vaccines, and parasite treatments during pregnancy unless cleared by your vet. Some flea and worming products are contraindicated; others are specifically labelled as safe in pregnant queens. Check the label or ask your vet before applying anything.
Preparing the queening box
Set up a queening box at least two weeks before the due date so the queen has time to investigate and accept it. A cardboard box or plastic crate lined with clean towels or newspapers works well. Choose a quiet, draft-free, dimly lit location away from other pets and household traffic. The room temperature should be kept around 75–80°F (24–27°C) for the first few days after birth — newborn kittens cannot regulate their own body temperature.
Some queens reject the box you've prepared and pick their own spot — under a bed, inside a wardrobe, in a laundry basket. As long as the spot they choose is safe, warm, and clean, it's usually best to let them have their preference and bring supplies to them rather than relocate her.
When to call your vet during labour
Most cat births proceed smoothly without intervention — but call your vet immediately if:
- The queen has been in active labour (visible straining) for more than 30 minutes without producing a kitten.
- More than 2 hours pass between kittens while she still appears to be in labour.
- You see green, dark, or foul-smelling discharge before any kitten is born.
- The queen seems extremely distressed, lethargic, or has a fever.
- A kitten is partially out and stuck, or has been still / not breathing for more than a minute after delivery.
Dystocia (difficult labour) is less common in cats than in dogs but is still a genuine emergency when it occurs. Brachycephalic breeds — Persians, Exotics, British Shorthairs — have higher rates of dystocia and may require a planned caesarean section.