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Name: Ryan
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How fast do house mice reproduce?

A mouse is pregnant for about 20 days, and after giving birth can become pregnant again within just 12 hours! If a female doesn't get pregnant again within the 1st 24 hours, she will be able to get pregnant again every 4-5 days onwards.

In a single litter a mouse can have anywhere from 4 to 12+ pups.

So the moral of the story? Get a cat. Or 2.


Susannah Sample
University of Wisconsin, School of Veterinary Medicine

House mice may breed all year, but perhaps not in mid-winter in colder parts of their range. A single female may have 5 or 6 litters in a year, with from 2 to 10 young in each.

J. Elliott

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