What is the main purpose of turning eggs in an incubator?

The main purpose of turning eggs in an incubator is primarily to prevent the embryo from sticking to the membranes inside the eggshell. As the embryo develops, it can become attached to the inner membrane due to the albumen (egg white) solidifying over time. Regular turning helps to keep the embryo free-floating within the egg, reducing the risk of attachment and promoting healthy development.

Turning also plays a role in ensuring that the embryo receives even temperatures and moisture, which are crucial during incubation. However, those benefits are secondary to the primary reason, which focuses on the embryo's physical development and positioning within the egg. By preventing the embryo from sticking, turning assists in overall healthy growth, which is vital for a successful hatch.