“I’m hungry.” “I need a snack.” “Do you have any snacks?” “Where are the snacks?”

Do these sound familiar? In our house I hear these most commonly right after a well-balanced meal has been served or right after we’ve gotten everyone buckled into the car.

The 4-month sleep regression is a major milestone in your baby’s development, not a setback. Around this time, your baby’s sleep cycles mature and they begin to wake more fully between stages of sleep. Some babies sail through the change, while others struggle with shorter naps or more frequent night wakings. With age-appropriate wake windows, a predictable bedtime routine, a calm sleep environment, and realistic expectations, this transition can become smoother for everyone. Remember, your baby isn’t forgetting how to sleep, they’re learning a new way to do it.