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1 You must not turn the eggs once they have been in the incubator for more than 16 days. 2  Donât open the incubator if you donât have anything important to place inside. 3  The chick obtained beyond 22 days are usually unhealthy.
The process of hatching takes place over the last couple of days, from the chick turning itself in the shell, to the moment that the first chip appears in the shell, until the chick finally emerges into the open air.umidity does not need to be controlled as rigidly in an incubator as temperature does. Eggs should be kept between 50 percent and 55 percent relative humidity during the first 18 days that the eggs are in the incubator.