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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.
The one exception is Muscovy ducks. These ducks have bumpy red faces and are white, black or a mix of white and black. This breed takes 35 days from the beginning of incubation to hatch. Muscovy hens can hatch 12 to 15 eggs, including eggs from other mothers added to her clutch.Domestic ducks are of two main types, the Muscovy and ducks breeds descended from mallards.he incubation period varies by species and generally takes about a month. When the ducklings begin to crack through their shells at the end of the incubation period, they should all hatch within 24 to 48 hours. Some eggs may fail to hatch.