Have you ever watched your peacefully sleeping baby suddenly fling their arms out wide, then pull them back in with a jerk—only to wake themselves up in the process? That’s the startle reflex, a completely normal part of infancy that often disrupts sleep, leaving both babies and parents frustrated and exhausted.
But what exactly is the startle reflex, and what can you do about it? Let’s explore the science behind it, why it happens, and how you can help your baby sleep more soundly despite it.