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Turning is literally that - eggs are turned during incubation. Incubated by the parent, the bird randomly shuffles the eggs around beneath it several times a day. In an incubator eggs are mechanically turned-over around, typically once every hour. Early in incubation, moving the eggs brings the embryo into contact with a fresh area of the surface of the yolk, the food for the embryo. Turning has other effects later in incubation.

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16y ago

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