How Long Are Cats Pregnant? Signs, Stages and Kitten Due Dates

Cats are remarkably efficient breeders. A healthy female, called a queen, can become pregnant as early as four to six months old and can have two or three litters a year. If your cat has spent time outdoors or with an unneutered male, it is worth understanding how feline pregnancy works, how to recognise it, and how to estimate when the kittens will arrive.

The information below reflects standard feline reproduction guidance used by veterinarians, along with practical lessons from breeders and rescue fosterers who care for pregnant cats every year.

A cat's pregnancy usually lasts 63 to 65 days, or about nine weeks. The normal range runs from roughly 58 to 67 days. Kittens born before day 58 are often premature and may struggle, so an early delivery deserves a call to your veterinarian.

Cats are induced ovulators, meaning the act of mating triggers the release of eggs. This makes the mating date a fairly reliable starting point for calculations, more so than in dogs. One complication is that a queen may mate with several males during a single heat, so kittens in the same litter can have different fathers and conception may span several days.

If you know when mating happened, add 63 days to find the estimated due date. A queen mated on February 3, for example, would be due around April 7, with kittens possibly arriving anywhere from early to mid-April.

When the mating date is unknown, which is common with outdoor or rescued cats, your vet can estimate fetal age using ultrasound or X-ray measurements. Once you have a date, a free gestation calculator helps you quickly count forward to the expected birth date and keep track of the days remaining.

Cats show few signs in the first two weeks. After that, watch for:

• "Pinking up." Around days 15 to 21, the nipples become enlarged and rosy pink. This is one of the earliest reliable signs.

• Stopped heat cycles. A queen who was calling regularly suddenly stops.

• Increased appetite and weight gain. Most queens gain around 1 to 2 kilograms over the pregnancy, depending on litter size.

• Behaviour changes. Many cats become more affectionate, while some become quieter or more reserved.

• Mild vomiting. A few cats have brief morning sickness, though persistent vomiting needs veterinary attention.

Weeks 1–3

Embryos travel to the uterus and implant. Your cat looks and acts mostly normal. Pinking up appears toward the end of this period.

Weeks 4–5

A veterinarian can often feel small swellings by gentle palpation from about day 17 to 25. Ultrasound can detect pregnancy from around day 16 and fetal heartbeats a few days later. Avoid pressing on her abdomen yourself.

Weeks 6–7

Her belly becomes rounded, and her appetite rises. Kitten skeletons start to mineralise, and from about day 42 an X-ray can show how many kittens to expect. Knowing the number helps you recognise when labour has truly finished.

Weeks 8–9

You may feel or see kittens moving. She will start searching for quiet, hidden places to give birth. Offer a nesting box lined with clean towels in a warm, low-traffic room and let her explore it.

Pregnant cats need more energy and protein, especially in the second half of pregnancy. Many veterinarians recommend gradually switching to a high-quality kitten food, which is richer in calories, protein, and essential nutrients. Offer smaller meals more frequently as her abdomen grows and space for the stomach shrinks.

Talk to your vet before giving any medication, flea treatment, or dewormer, because some products are unsafe during pregnancy. Keep her indoors as her due date approaches, both for safety and so she gives birth somewhere you can monitor.

In the last day or two, many queens become restless, groom their genitals frequently, pant or purr loudly, and refuse food. Her temperature may drop slightly about 12 to 24 hours before labour.

Kittens typically arrive 30 to 60 minutes apart, each in its own membrane, which the mother usually removes and licks clean. Cats can also pause labour for many hours, rest and nurse, then resume delivery. This "interrupted labour" is normal in cats provided she is calm and not straining.

Call your veterinarian promptly if:

• She strains hard for more than 20 to 30 minutes without producing a kitten.

• A kitten is visible in the birth canal but not delivered within about 10 minutes.

• There is heavy bleeding or foul-smelling discharge.

• She is lethargic, collapses, or shows signs of distress.

• She passes day 70 without giving birth.

Kittens should nurse within the first few hours, since early colostrum provides vital antibodies. Weigh them daily on a kitchen scale; steady weight gain is the best sign they are feeding well. Be aware that a queen can come back into heat within weeks of giving birth, sometimes even while nursing, so keep her away from intact males. Discuss spaying with your vet once the kittens are weaned.