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8. Adjust the humidity levels in the incubator. Humidity should be around 45 to 50 percent throughout incubation, except during the last three days when you will want to raise it to 65 percent. You may need higher or lower humidity levels depending on the type of eggs you wish to hatch.. Record the day and how many eggs you've incubated on a calendar. You should be able to estimate your hatch date based on average incubation times for the bird species you want to hatch. For example, chicken eggs typically take 21 days to hatch, whereas many duck varieties and peafowl may take 28 days.
The humidity levels should be between 50 and 55% and then increase to about 65% for the final three days of incubation. A pan of water under the egg tray provides the necessary moisture in most incubators. You may need to add warm water from time to time. The humidity can be adjusted by increasing or decreasing ventilation in the chicken incubator. Incubator Placement. Just as the temperature and humidity inside the incubator can affect your eggs, the temperature outside of the incubator can as well. Try and place your incubator in a room where the temperature is between 21 and 24 degrees Celsius and not vulnerable to direct sunlight, drafts or varying temperatures.