How many kittens does a cat usually have in her first litter?

A cat’s first litter usually has 1 to 8 kittens, most often 3 to 6. The number in a first litter is related to the mother’s size – a larger, sturdier cat tends to carry more. Fertilization rate also matters: if both the male and female are healthy, the rate is higher and so is the kitten count. If an owner wants to know the exact number, a B-ultrasound at 30-40 days into pregnancy can confirm the count and check development.