House Mouse Reproduction
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
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.
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.
Click here to return to the Zoology Archives
Update: June 2012