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How early can be sexed

M

mullinsn2000

Superman
This is probably a dumb question, but I have yet to find the answer anywhere. how soon can baby mice be sexed. I have a 1.2 breeding trio and if the females give birth i want to use some pinks as feeder and get another breeding group so i can produce more. Thanks
 
Determining the sex of mice is accomplished by comparing the distance between the anal opening and genital papilla (anogenital distance). This distance is shorter in females and greater in males. Determining the sex of very young mice may be difficult for the beginner, and it is often helpful to compare a number of littermates.

In older mice, the presence of nipples indicates a female, as male mice do not have nipples.


Once they start getting fur its real easy to see the ones that have nipples and the ones that dont, I've found that to be the easiest.
 
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