The 4-Month Sleep Regression—What’s Actually Happening & How to Handle It

Jul 2

You’ve finally hit a groove—and suddenly your baby starts waking more at night, fighting naps, and crying during bedtime. Sound familiar? Welcome to the 4-month sleep regression. But here’s the thing: it’s actually a developmental leap, not a setback.

What’s Going On?

Around 3.5 to 4 months, your baby’s sleep matures. They move from newborn-style sleep to adult-like sleep cycles with light and deep stages—and that means more frequent wake-ups.

This isn’t a regression in the true sense. Your baby’s brain is growing—and fast.

Signs of the 4-Month Sleep Regression:

Short naps
Frequent night wakings
Fussiness before bed
Increased need for comfort
Early morning wakings

What Can You Do?

Create a consistent bedtime routine
Start laying baby down drowsy but awake
Make sure they get full feeds during the day
Use white noise and dark, cool sleep spaces

This is also a great time to avoid creating habits you’ll want to break later (like rocking to sleep every time).

When to Ask for Help

If you’re feeling like the regression is lasting too long or your baby isn’t adapting, it may be time to get support. You don’t have to do this alone.

Want a Clear Plan?

Inside my Baby’s Sleep Essentials eBook, I explain what’s changing in your baby’s sleep and how to support them through it. And if you want a personalized strategy, I offer 1:1 guidance with my Dreams to Rest: Sleep Solutions Package.

Amanda Hatch