The egg-laying process is triggered by hormones, which stimulate the ovary to release a yolk. The yolk then travels through the oviduct, where it's surrounded by egg whites and shell membranes, and eventually, a shell is formed around it. It's like a little factory inside the chicken, producing eggs on a regular basis.
Now, you might be wondering, how often do chickens lay eggs? Well, it depends on the breed and the individual chicken, but most chickens will lay an egg every 24-26 hours. That's a lot of eggs, if you ask me! And the best part is, chickens will keep laying eggs for years to come, as long as they're healthy and happy.