We all wake up several times a night as we transition through sleep cycles. But sometimes our little ones wake up in the middle of the night and are really up…sometimes for hours. This isn’t the typical middle of the night “go in and comfort or feed baby for ten minutes and then he goes back to sleep” wakeup. This is a full-blown 3:00 a.m. party. These wakes up are often referred to as split nights, and are characterized by a long stretch of sleep, followed by a waking of more than an hour where baby is happy and energetic, and then eventually back to sleep again. Let’s take a quick look at why this happens and what the solutions are.