pregnancy question.

Question
whats the earliest age a female mouse can get pregnant? i bought two tiny black and white female mice and they were in cage with a bunch of males. and these mice were all tiny. can a mouse get pregnant when they are babies? cause im worried they could be pregnant. they are too young to tell though. the guy at the pet store could barely tell if one of the females was a female or not until he looked really closely because they are so small.

Answer
Female mice can get pregnant at about anywhere between four to twelve weeks so they could be pregnant but it's harder for younger mice to get pregnant so you might not even have a problem. If you don't see weight change they're not pregnant. If in three weeks time there are no babies then they're not pregnant. Hope all goes well.