Age females can be impregnated?

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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Rats are sexually mature at 5 weeks of age.

So do people seperate them by sex? I'd imagine that they are right at a medium rat size by 4-6 weeks so even if they get pregnant it would only be by a week or so by the time they are euthanized and frozen.


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Originally Posted by Gomojoe

So do people seperate them by sex? I'd imagine that they are right at a medium rat size by 4-6 weeks so even if they get pregnant it would only be by a week or so by the time they are euthanized and frozen.


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Yeah. You have to separate them by sex otherwise, they might start to breed.
I haven't seen any of my rat pups breed as young as 5 weeks, but better safe than sorry.

They get weaned by 4(ish) weeks. So smaller than small. I don't know how many grams, but this is what my weans look like:

The little one on the right is ~3 weeks old.
The middle is weaned.
The big one is ~ 5 months old.
http://img.photobucket.com/albums/v9...84894560_o.jpg

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Originally Posted by Gomojoe

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.

People say females can get pregnant at 5 weeks old. I have never had that happen and I keep them together till I feed them off, or move the hold back females into a tub of females. All of my weaners stay together for a few weeks before I move them into my breeding rack, those females don't have a litter for another 2 months or more.

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Originally Posted by SlitherinSisters

All of my weaners

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:rofl:

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Originally Posted by Mike41793

:rofl:

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Hey, I get to say fun things in the reptile community and I take every opportunity I can :P