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A chicken can be hatched from under the mother hen after 21 days of sitting on them, as long as the eggs are turned for the first 18 days, twice a day (morning and night).

But, I think you are referring to an incubator, where you put fertilized eggs at a certain temperature, and turn them just as a mother hen would do. I have put a lot of eggs in my incubator, and most of them hatched, so you've got a good chance to hatching most eggs.

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15y ago

What else can I help you with?