That’s right, I said it. Your baby will never sleep straight through the night. And neither will you, for that matter. We’re all familiar with the various stages of sleep from our own experience. You might not be able to put a name to them, but you’ve certainly felt the difference between waking from a light sleep and a deep one. Simply put, when we fall asleep, we spend a little while in a light stage of sleep and gradually progress into a deeper one.