The newly laid egg may or may not contain everything it needs to develop into a baby chick, depending on whether or not it has been fertilized. If the egg is fertilized, it can be incubated in a specially designed incubator or cared for by a broody hen until it hatches into a chick. While the embryo inside the egg is developing, the unhatched chick will use the yolk inside the egg to provide the nutrition the chick needs to grow and develop.