Fertile eggs can be kept at room temp or a bit cooler (but not in the fridge!) for up to about 2 weeks, like a hen laying a large clutch of eggs over several days before setting on all of them at once. They will stay happily dormant for quite a while until heat is applied and wakes them up. Once incubation really begins, though, they must be kept warm or will die.
Fertile eggs can be kept at room temp or a bit cooler (but not in the fridge!) for up to about 2 weeks, like a hen laying a large clutch of eggs over several days before setting on all of them at once. They will stay happily dormant for quite a while until heat is applied and wakes them up. Once incubation really begins, though, they must be kept warm or will die.