Egg development and laying process A female chick is born with - TopicsExpress

Egg development and laying process A female chick is born with thousands of tiny ova, which are undeveloped yolks. Once she reaches maturity, an ovum will be released into a canal called the oviduct and begin its journey of development. At any given time a productive hen will have eggs of several stages within her reproductive system. From the time an ovum leaves the ovary, it takes approximately 25 hours for the egg to reach the vent for laying. If sperm is present, the yolk will be fertilized before the albumen is deposited. As a chick embryo develops in a fertilized egg, the yolk provides nourishment and the albumen cushions the embryo.

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