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You should continue to incubate the eggs after the outage; then candle them 4 to 6 days later to check for further development or signs of life. If, after 6 days, you do not see life or development in any of the eggs, then terminate incubation.Most of the time, a power outage will delay hatching by a few days and decrease the hatchability to 40-50 percent. Humidity The relative humidity of the air within an incubator should be about 60 percent.During the last 3 days (the hatching period) the relative humidity should be nearer 65-70 percent.ost of the time, a power outage will delay hatching by a few days and decrease the hatchability to 40-50 percent. Humidity The relative humidity of the air within an incubator should be about 60 percent. During the last 3 days (the hatching period) the relative humidity should be nearer 65-70 percent.
Therefore, do not store eggs more than 7 days before incubating. After 3 weeks of storage, hatchability drops to almost zero. Plan ahead and have a regular hatching schedule to avoid storage problems and reduced hatches. Allow cool eggs to warm slowly to room temperature before placing in the incubator.hen hatching, the humidity is increased to 65% relative humidity or more. An excellent method to determine correct humidity is to candle the eggs at various stages of incubation. The normal size of the air cell after 7, 14, and 18 days of incubation for a chicken egg is shown.