Hens can lay their own eggs without the cooperation of roosters. As long as the season is right, hens will lay their own eggs. Such eggs are infertile, and the laid eggs can't hatch into chicks, which are mainly used for market sales, so the eggs we usually eat are like this. Hens can also lay eggs through the cooperation of roosters. After successful fertilization, the eggs laid by the hen are fertilized eggs, and such eggs can hatch chicks.