The 4-Month Sleep Regression:
What It Is (and Three Things You Can Do Before It Starts)
If your baby is around 3–4 months old, you've probably heard about the “dreaded 4-month sleep regression”.
Let’s talk about.
You might be wondering if it's really as bad as everyone says.
Take a deep breath.
The good news is that while this stage can certainly bring changes to your baby's sleep, there are a few gentle things you can begin doing now that may help make the transition feel much smoother.
First... what is the 4-month sleep regression?
Around four months of age, your baby's sleep begins to mature.
Instead of sleeping like a newborn, they begin cycling through lighter and deeper stages of sleep much like adults do.
As they move between these sleep cycles, it's common for babies to wake more frequently at night and struggle with 30-40minute naps. Some settle back to sleep easily, while others need help getting back to sleep each time.
That's why many parents suddenly find themselves saying things like:
"My baby used to sleep so well... what happened?"
The truth is...
Nothing has gone wrong.
Your baby's sleep is simply developing.
Three things you can start doing now:
1. Practice laying your baby down awake once or twice each day.
This doesn't mean every nap has to be independent. Far from it.
Contact naps, rocking, cuddles, and feeding to sleep all have their place—especially in the early months.
But if your baby is approaching four months, gently introducing one or two opportunities each day to fall asleep in their sleep space can help them begin developing confidence in falling asleep there.
Think of it as practice, not perfection.
2. Protect daytime sleep.
One of the biggest mistakes we see is babies becoming overtired during the day and this overtiredness spills over into bedtime - making falling asleep suddenly really hard.
Many babies around this age still need approximately 4–5 hours of daytime sleep, although every baby is different.
If that means contact naps, baby wearing, stroller walks, help your little one get the restorative sleep they need...
That's okay. Do it!.
A well-rested baby often finds it much easier to settle at bedtime and navigate changing sleep patterns.
3. Create a predictable bedtime routine.
Babies thrive on repetition.
Your bedtime routine doesn't need to be elaborate.
Here’s a simple routine you can follow:
Feeding, bath, lotion massage, jammies, sleep sack, cuddle and song, into bed.
When repeated consistently, these simple cues begin signalling to your baby's brain that a “long” sleep is coming.
Over time, many babies visibly relax as the routine begins because there aren’t any new surprises. They know exactly what will happen next. This brings them security and comfort.
What if my baby already needs to be rocked or fed to sleep?
First...
Please know you're not alone.
Many babies are lovingly supported to sleep during these early months, and that's okay.
If your baby isn't yet able to fall asleep independently, it doesn't mean you've created a bad habit or that you've done something wrong.
It simply means your baby hasn't learned that skill yet.
And like so many other developmental milestones, sleep skills can be taught gently, one step at a time.
Remember...
The goal isn't to create a "perfect sleeper" before four months.
The goal is to build a strong foundation that helps both you and your baby navigate this next stage with greater confidence.
Some babies breeze through the four-month sleep regression.
Others need a little more support.
Neither outcome is a reflection of your parenting.
We'd love to help.
If you've been trying to lay your baby down awake but every attempt ends in tears, frustration, or another contact nap, know that you don't have to figure it out alone.
At Sleepy Ever After, helping families troubleshoot these tricky stages is exactly what we love to do.
Sometimes all it takes is one conversation and a personalized plan to help you understand why your baby is struggling—and what gentle strategies are most likely to work for your little one.
Our Sleep Strategy Call is designed for parents who don't need weeks of support—they simply need clarity, encouragement, and a plan that fits their baby.
We'd be honoured to help you build those sleep skills together. 🤍
