Stroke is an abrupt interruption of constant blood flow to the brain that causes loss of neurological function. The interruption of blood flow can be caused by a blockage, leading to the more common ischemic stroke, or by bleeding in the brain, leading to the more deadly hemorrhagic stroke.
Most ducks do not start laying eggs until they are between 9-11 months old. Depending on the breed they can lay year round. A duck will lay an egg a day until they have a clutch, between 8-15 eggs and then the mother will sit on them.
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..