Age females can be impregnated?

[Stewart_Reptiles]

I'm wondering what age rat females can be impregnated? I plan on only growing out feeders to medium size before euthanizing them, but can they become pregnant before then?


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Sexual maturity is around 5 weeks which usually at that time in my case they are all fed off since I feed small to medium rats only (4 to 5 weeks)

Only holdbacks are separated by sex so the female can be bred in the future when reaching about 225/250 grams.