The average length of a cat pregnancy is between 63 and 65 days. However, some cats may give birth earlier or later than this.
During a cat's pregnancy, the kittens will continue to develop and grow in the womb. During the first few weeks, the kittens will develop their organs and limbs. During the last few weeks, the kittens will continue to grow and gain weight. Around the 63rd day, the mother cat will go into labor and give birth to her kittens.