How long

[Naser]

I need to hatch eggs from 4 ancona hens, they lay two eggs a day, my incubator takes 22 eggs, how long can you store eggs for reasonable fertility

 

[ChickenFox]

For the best fertility I used to only keep mine for up to a week. Some people only use them if laid in the last 3-5 days others have had success with older than a week. You could make an experiment of it and mark the day the egg was laid on the egg then see how they fare hatching to get a better idea of how long you can store them before losing too much fertility.

Good luck!