The 4-Month Sleep Regression Survival Kit

We had just started sleeping in stretches. Like, actual four-hour stretches at night. My wife and I were feeling something that approximated hope.

Then, at almost exactly four months, our son started waking up every forty-five minutes. Every single night. For three weeks.

The four-month sleep regression is brutal. But it is also a normal developmental phase. Here is what you need to know.

What is actually happening

Your baby is not broken. Their sleep cycles are maturing. They are learning to connect sleep stages the way adults do. And that process is disruptively hard for them.

It is not a regression in the sense that something went wrong. It is a progression that does not feel like one.

Why it hits so hard

By four months, you have often established some kind of rhythm. You know what you are doing. You are getting more sleep than the early weeks.

Then it all falls apart and you feel like you are back at square one. Except you are more exhausted than square one because you have been running on fumes.

What helps

Keep the routine. Babies thrive on predictability even when they do not seem like they are responding to it.

Give it time. This regression typically lasts two to six weeks. It will end.

Take shifts. If you have a partner, split the night so one of you can at least get a solid block.

Lower expectations. You do not have to be optimal right now. Survival is the goal.

What does not help

Trying to force a sleep training method during the regression. The baby is not going to respond to extinction when their brain is going through a developmental leap.

Panic-calling the doctor. Developmentally normal, even if it does not feel that way.

The thing I keep coming back to

This phase ends. It ends for every baby who has ever gone through it. Your baby will sleep again.

You will survive this. It feels like it will last forever. It will not.

Cradld has sleep support tools for exactly this moment.