humidity requirement to hatch chicken eggs
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.