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I believe it is 21-24 days

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21 to 30 days

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Having owned MANY rats I can tell you that for the average pet rat it is ABOUT 3 weeks from mating. However if you did not see the mating but are guessing from the size of the animal then,,, if it LOOKS pregnant put it in it's own box and leave it alone. It'll probably drop in less than 2 weeks. Remember though, leave it alone as handling the babies or stressing the mum may cause her to eat the babies.

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21-23 days

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Wiki User

9y ago

What else can I help you with?