How is a human egg is similar to a chicken egg

People don't lay eggs what are you talking about

People don't lay eggs? Might be an issue, but let's try anyway.

For both human and chicken babies, there is a kind of food inside the womb/egg already, whether in the form of the mother eating food or the yolk.

There is a guard so the baby won't die of cold, either the womb or eggshells.