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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.
During hatch, of course, you want high humidity in the range of 65% or more so that the chicks won't get stuck in the shell, but the goal is 40 to 50% for the first 19 days.lick on the RSS button after you add a comment to subscribe to the comment feed. Humidity is one of the most important factors determining your hatch rate, but, contrary to popular belief, high humidity is more troublesome than low humidity during most of the incubation period.