A single pair of cats and their offspring can produce up to 420 kittens in 7 years. This is because each pair of cats can have two litters a year, with an average of six kittens per litter.
The average number of kittens in a feline litter is four to six. Up to 4,948 kittens can be born from one unspayed female cat and her offspring in seven years. Females become pregnant during their estrus or “heat” periods.
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