Feline Pregnancy and Queening
A cat's pregnancy is a rapid process, bringing a litter of kittens into the world in just over two months. Cats are incredibly prolific breeders; they are 'induced ovulators', meaning the physical act of mating triggers the release of eggs, virtually guaranteeing a successful pregnancy when bred.
The Gestation Timeline
The gestation period for a domestic cat averages between 63 and 67 days, with 65 days generally accepted as the median. A pregnant cat (referred to as a 'queen') will begin showing physical changes quite early. Around week 3, her nipples will become enlarged and take on a distinct rosy pink color, a phenomenon commonly called 'pinking up'.
The Formula
To estimate the date of delivery (queening), this calculator adds the median 65-day gestation period to the exact date of mating.
Estimated Due Date = Date of Mating + 65 Days
Preparing for the Kittens
In the final two weeks of pregnancy, the queen will begin aggressively seeking out a safe, secluded place to give birth. If you do not provide a comfortable nesting box in a quiet, dark closet or corner, she will likely choose a location herself—often your laundry basket or the back of a hard-to-reach cabinet. Line the nesting box with clean, easily washable blankets or puppy pads, and ensure her food, water, and litter box are situated nearby so she does not have to leave her newborn kittens to tend to her basic needs.