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A cat's pregnancy typically lasts 65 days, though it can take as few as 63 or as many as 71 days in some cases, according to WebMD. During her pregnancy, your little girl becomes more docile than usual, and she won't go into heat.
Cancel. Cats are generally pregnant for 65 days before they will give birth to kittens. Signs of a pregnant cat will include swollen mammary tissue, swollen abdomen areas and the cat may start to produce milk.