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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.
Once you place a fertilized egg under the incubator, it will normally take about 21 days before the chick comes out. Each model of incubator has its own instructions, and it is very important that you follow them. Generally, the temperature should be kept constant at around 99 degrees Fahrenheit.or those new to hatching chicken eggs, if your incubator does not have an automatic egg turner, you will have to do this yourself, three times a day, by hand.