In just 18 months a female cat can have 2000 descendants. The age at which a female cat can first get pregrant is about 4 months. The length of the pregrance is about 2 months and can have 4 to 6 kittens in each little. The average amount of litters a female cat can have in one year is 3. The age which a female cat no longer has litters is about 10 years.