The pups are born without fur, ears or the ability to see. By that time, her offspring’s offspring have likely also birthed a few litters, which are starting to breed. This cycle continues until the mouse dies. She can mate immediately after giving birth, meaning mice can birth a second litter in as little as 25 days after the first. Each litter typically consists of five or six mouse pups, though it’s not rare to see as many as 12 in a litter.Ī typical female mouse can birth between five and 10 litters per year. When a female mouse gets pregnant, it only takes between 19 and 21 days for her to give birth to a litter. At that point, you no longer have a mouse problem – you have a mouse infestation.
Just one female mouse in your home can average between 25 and 60 offspring in a single year. It’s not that the mouse lifespan is unnaturally long, but more that mice are notorious breeders. The life cycle of a mouse makes it easy to see why these rodents are such common pests. If you think you can avoid dealing with that mouse in your home by simply waiting for it to die, think again.
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