how long after mating is fertilized egg laid
As an ovum moves down her oviduct and begins to form into an egg, the duck hen mixes in a little sperm from her sperm storage. The eggshell then forms around the ovum, yolk and sperm, and creates the egg we recognize. She will do this every day up to two weeks, laying an egg each day. Once the entire clutch of eggs has been laid, the new mother will begin to incubate them, until they hatch. During this time, you can check to see if the eggs have been fertilized with a process called candling..