Is There A Nine-Month Sleep Regression?

You thought you were out of the woods.

Your baby was finally sleeping stretches you could count on.

And then, bam.

Out of nowhere: bedtime battles, split nights, and wakeups that feel like newborn déjà vu.

Sound familiar?

If your baby is around 8 to 10 months old and suddenly sleeping worse, you might be wondering: is this a sleep regression? Is it teething? Separation anxiety? A growth spurt? Are we doing something wrong?

Let me reassure you: this is incredibly common... and incredibly frustrating. But there are real reasons it’s happening, and real ways to support your baby through it.

What Is the 9-Month Sleep Regression?

Around 8–10 months, many babies experience a noticeable disruption in their sleep. While it’s not a “regression” in the sense that your baby is losing skills, it is a period of rapid development that often makes sleep harder.

This stage typically includes:

• New motor skills (crawling, pulling to stand, cruising)
  
• Cognitive leaps (object permanence, language development)
  
• Increased separation anxiety
  
• Changes in daytime sleep needs
  
  

All of this growth can lead to:

• More night wakings
  
• Shorter or skipped naps
  
• Fighting sleep at bedtime
  
• Waking up and staying awake for long stretches
  
  

Why This Happens

1. Motor Development Is Disruptive

Your baby’s body is buzzing with new skills. Just like you might lie awake the night before a big presentation, your baby’s brain is practicing crawling or standing—even in their sleep.

2. Separation Anxiety Peaks

Around 9 months, babies begin to understand that you exist even when you’re not in the room. This new awareness can trigger distress at bedtime or during night wakings.

3. Nap Transitions Are Brewing

Babies typically shift from 3 to 2 naps by this age. That transition can cause overtiredness or undertiredness, both of which disrupt sleep.

4. Sleep Habits Start to Solidify

By now, your baby may have established habits around how they fall asleep. If those habits rely heavily on your help, it can get harder for them to link sleep cycles during this more sensitive stage.

What You Can Do

You don’t have to wait it out. Here’s how to gently support your baby through this sleep disruption:

✅ Stay consistent with bedtime routines. A predictable wind-down helps signal safety and sleep, even when things feel shaky.

✅ Support but don’t overcompensate.It’s okay to offer comfort—but try not to create brand new sleep associations that will be hard to maintain later.

✅ Evaluate your nap schedule.If your baby is fighting naps or bedtime, it might be time to tweak wake windows or shift to a 2-nap schedule.

✅ Offer safe space for new skills during the day.Let them practice crawling or pulling to stand outside the crib so they’re less likely to rehearse at 2am.

✅ Consider a gentle night weaning program. Night feedings are no longer nutritionally necessary at this age and may actually be contributing to night wakings. 

You’re Not Doing Anything Wrong

This is a tough stage for a lot of families. You’re not alone—and you’re not failing.

In fact, these disruptions are a sign of healthy development. Your baby is growing fast, and that growth can temporarily make sleep messy. But with support and a few small shifts, you can get back on track—and so can your baby.

Need support? I can help.

If sleep has gone off the rails and you’re ready for a plan that works without harsh methods, I’d love to help you find a path forward.

Here’s the link to sign up for 1:1 support to get your family well rested and feeling amazing.