Cat Pregnancy Calculator

Feline gestation guide

Everything you need to know about cat pregnancy

Feline pregnancy, also called gestation, is a remarkable biological process that transforms a cat from a single fertilised egg into a litter of fully formed kittens in just over nine weeks. Understanding what is happening at each stage helps you provide the best possible care and recognize when something may be wrong.

How long are cats pregnant?

The average cat gestation period is 65 days (approximately 9 weeks and 2 days) from the date of mating. However, the normal range is 61 to 72 days. Cats that give birth before day 61 are considered premature, and kittens born before day 58 are unlikely to survive without intensive veterinary support. Cats that have not given birth by day 68 should be seen by a vet.

Signs of pregnancy in cats

The earliest and most reliable visible sign of cat pregnancy is "pinking up" of the nipples, which typically occurs around 2-3 weeks after mating. The nipples become darker pink and slightly enlarged. Other early signs include:

• Weight gain: Most cats gain between 1-2 kg during pregnancy, with most gain occurring in the second half.
• Increased appetite: The queen will typically eat significantly more, especially in the later weeks.
• Morning sickness: Some cats experience brief bouts of nausea and reduced appetite around weeks 3-4.
• Nesting behaviour: From around week 6-7, the queen will seek out quiet, enclosed spaces to prepare for birth.
• Abdominal enlargement: Clearly visible from around week 5 onwards.

Confirming pregnancy

Your veterinarian can confirm pregnancy by abdominal palpation as early as day 17-25, when the embryos feel like small firm swellings in the uterine horns. Ultrasound can detect heartbeats from around day 24-28. X-rays can show skeletal development from around day 42-45, and are the most reliable way to count the number of kittens in late pregnancy.

Nutrition during pregnancy

Feeding your pregnant cat correctly is one of the most important things you can do for her health and the health of her kittens.

• Weeks 1-4: Maintain normal adult feeding. Avoid overfeeding in early pregnancy as excess weight gain can complicate labour.
• Weeks 4-9: Gradually switch to kitten food, which has higher protein, calcium, and calorie content. By week 7-8, the queen may be eating 1.5 to 2 times her normal amount.
• Late pregnancy: As kittens compress the stomach, offer smaller, more frequent meals rather than one or two large ones.

Never give supplements unless specifically prescribed by your vet. Excess calcium or vitamin A in particular can cause serious fetal defects.

Preparing for the birth (queening)

Set up a nesting box around week 6-7. This should be a box or crate large enough for the queen to stretch out comfortably, lined with clean soft bedding (towels or fleece), and placed in a quiet, warm, dimly lit area. Introduce your cat to the box well in advance so she becomes comfortable with it.

The room temperature should be around 25-29 degrees Celsius for newborn kittens, who cannot regulate their own body temperature. Gather supplies: clean towels, blunt-ended scissors, dental floss (for tying off umbilical cords if needed), a heating pad or hot water bottle wrapped in a towel, and a postal scale for weighing kittens at birth.

Signs of imminent labour

Labour typically begins 12-24 hours after the following signs appear:

• Temperature drop: The queen's rectal temperature drops below 37.8 degrees Celsius (100 degrees Fahrenheit), usually 24 hours before labour begins. Normal cat temperature is 38.2-39.2 degrees Celsius.
• Restlessness, pacing, and vocalisation
• Intensive grooming, especially of the abdomen and perineum
• Loss of appetite
• Clear or slightly blood-tinged vaginal discharge
• Milk expression from the nipples

The birthing process

Kittens are usually born head-first, but breech presentations (tail first) are also normal in cats. Each kitten is born enclosed in an amniotic sac, which the queen will typically tear open immediately and lick away. She will then sever the umbilical cord by chewing. Placenta follows within 5-15 minutes of each kitten.

The interval between kittens is typically 15-60 minutes, but it can be up to 2 hours in a normal delivery. The queen may take a resting break between kittens. Total queening time for a litter of 4-6 kittens is typically 2-6 hours.

Disclaimer

This calculator provides estimates for informational and planning purposes only. Gestation lengths vary between individuals. Always consult a qualified veterinarian for medical advice about your cat's pregnancy, labour, and postnatal care. Do not delay seeking veterinary assistance if you are concerned.