The 4 month sleep regression is when your baby’s typical sleep habits begin to change. The night wakings may become more frequent and the tricks you’ve always used to get your baby to sleep likely won’t be as effective as they once were. These changes are normal and developmentally appropriate, but they can be enough to make exhausted parents want to pull their hair out. Don’t worry! Here are a few key ways to survive the regression and get your little one back on track for sleep success.