Rather than having sexual organs, roosters and hens have something called a cloaca. When the rooters presses his cloaca against that of the hen, he is able to deposit his sperm and the sperm fertilizes the yolk in the hen’s cloaca. Hen’s ovulate every 24-48 hours. Once the yolk is fertilized, the egg finishes forming and the hen will lay the egg within about 24 hours after ovulation. And, after the egg hatches, we have an adorable, fuzzy little chick.