Sure, I highly recommend reading this article, but here are some good quotes from it:

For each egg a hen produces, they excrete 10% of the calcium (for the shell) that is stored in their bones. This is why you’ll often see egg-laying hens with weak or broken bones, osteoporosis or even paralysis ... hens have a natural tendency to eat their own eggs to replenish the nutrients that are lost during the egg-laying process.

There are a few things that can go wrong with egg-laying chickens. Eggs can get stuck inside them, and unfortunately, if they break, it can get infected and they can die if gone untreated. One of the reasons this could be is because they don’t have enough calcium in their system to make a strong enough eggshell.

Chickens instinctively lay more eggs when their eggs are taken away from them. So when we take eggs away, we’re encouraging them to lay more eggs in what is called a clutch. A clutch is simply a group of eggs being produced by the hens in one period. So, the less we take, the less they lay.

Laying an egg is a huge process for a chicken and takes a lot, so they need nutrients from the eggs they can eat. When we take the eggs from the chickens, we're directly harming them by blocking them from something they need - lowering their quality of life.