This is similar to the pregnancy period of a woman, which is closer to around 9 months or ~260 days. However, actual gestation period of a cow can range from 270 days to 295 days, depending primarily on breed[s], age, body condition and nutritional health.Gestation period is also controlled by genetics, but not rate of maturity.his is similar to the pregnancy period of a woman,  which is closer to around 9 months o â¦ r ~260 days.    However, actual gestation period of a cow can range from 270 days  to 295 days, depending primarily on breed[s], age, body condition  and nutritional health.
Whereas fertilized chicken eggs usually take exactly 21 days to hatch, most duck eggs take 28 days, apart from Muscovy ducks. As a general rule of thumb, the eggs of Muscovy ducks take 35 days, but once again, it can vary slightly depending on conditions.
Eggs are moved from the incubator to a hatcher at 46 days. They will hatch from 48 days to 52 days. The hatcher has compartments for each egg-chick and is the same temperature/humidity as the incubators.mu Egg Incubators At The Emu Oil Depot These incubators will hold 84 eggs and are turned automatically. There are three shelves of 28 eggs each. Smaller, less expensive incubators will turn eggs too, but only by tilting the shelves 45 degrees or so and that isn't enough.