The 8–10 Month Sleep Regression

If your baby sailed through the middle of the first year sleeping beautifully and has now, seemingly overnight, started waking multiple times, popping up to stand in the crib, and protesting bedtime like it's a personal offense, you are likely in the 8 to 10 month sleep regression.

Here's the reassuring part: this regression is caused by a burst of exciting development, not by anything going wrong. Your baby's brain and body are doing extraordinary work. Once you understand what's driving it, the path through becomes much clearer.

What Is the 8-10 Month Regression?

A sleep regression is a temporary period where a baby who was sleeping well suddenly starts waking more, fighting sleep, or napping poorly, without illness to explain it. The 8 to 10 month version tends to be less about a fundamental change in how sleep works (that was the 4-month shift) and more about a pileup of developmental milestones all landing at once.

In other words, your baby is too busy learning and too flooded with new feelings and abilities to sleep as easily as they did a few weeks ago. It's a phase, not a new baseline.

It also doesn't always land exactly at a particular month. Some babies hit it at 8 months, others closer to 10, and a few experience it more as a rolling series of bumps as one milestone after another comes online. What ties them together is the theme: a wave of rapid development temporarily outcompeting sleep. Knowing that upfront takes a lot of the worry out of it, because it means the wakings have an expiration date built in.

What Causes It

Several forces usually converge in this window:

• Intense gross-motor practice. Crawling, pulling to stand, and cruising along furniture are exploding right now. Babies famously "practice" these skills in the crib at 3 a.m., because the drive to move is so strong.
• Separation anxiety and object permanence. Around this age babies grasp that you continue to exist when you leave, and they very much want you to stay. That realization can make bedtime and night wakings suddenly emotional.
• A possible 3-to-2 nap transition. For some babies this is when day sleep reorganizes, which can ripple into the nights. Our guide to baby nap transitions covers how to handle that piece.
• Teething. Several teeth often arrive in this stretch, adding physical discomfort to the mix.
• Language and cognitive leaps. Understanding more words, gestures, and cause-and-effect is mentally demanding, and busy brains sleep more lightly.

Signs to Watch For

The 8 to 10 month regression tends to look like some combination of:

• More frequent night wakings after a stretch of solid nights
• Standing up in the crib (and then not knowing how to get back down)
• Protesting or stalling hard at bedtime
• Shorter or skipped naps
• Extra clinginess and tears when you leave the room
• Waking earlier in the morning

You may notice these come and go in clusters rather than all at once. A few nights of crib gymnastics might give way to a stretch of separation-anxiety bedtimes, then a rough patch of short naps. That ebb and flow is classic for this age; it reflects your baby cycling through different milestones rather than one steady problem.

If your baby also has a fever, is pulling at their ears, is unusually inconsolable, or is off their feeds, check in with your pediatrician to rule out illness before chalking it up to the regression. Sleep changes that come bundled with those symptoms deserve a look, because a passing cold or an ear infection can masquerade as a regression.

How Long It Lasts

The typical 8 to 10 month regression lasts about two to six weeks. It tends to ease as the driving milestone becomes old news: once your baby can pull to stand and lower themselves back down confidently, and once the separation-anxiety wave crests, sleep usually reknits itself.

The most important thing you can do during these weeks is avoid accidentally turning a temporary phase into a lasting habit, which brings us to how to respond.

How to Cope

Your north star through any regression: keep things boringly consistent and resist inventing new sleep crutches. Specifically:

Keep the routine rock-steady

Now is the time to lean hard on your predictable, calming bedtime routine. Familiar steps in the same order are deeply reassuring to a baby whose world feels a bit wobbly.

Offer lots of daytime motor practice

Give your baby plenty of floor time to crawl, pull up, and, importantly, practice getting back down. The more they master a new skill during the day, the less they feel compelled to rehearse it at night.

Teach lying back down

If your baby stands in the crib and gets stuck, calmly help them lie down, then step back. Do it matter-of-factly and repeatedly. They're often not upset about being awake so much as unsure how to reverse the move they just made.

Give brief, calm reassurance

Separation anxiety is real, so respond with warmth, but keep night check-ins short, low-key, and boring. A steady hand and a few reassuring words beat a long, stimulating intervention.

Avoid new sleep crutches

It's tempting to start feeding to sleep or rocking for an hour again to survive the week. Try not to. New associations formed now can easily outlast the regression itself. If old habits have crept back, our guide on wake windows by age can help you re-anchor the schedule so sleep pressure is doing more of the work.

Check wake windows and the nap schedule

Overtiredness makes every regression worse, because a tired baby wakes more easily and protests harder. Confirm the naps and wake windows still fit your baby's age, and use an earlier bedtime on rough days to take the edge off. At this age, wake windows before bedtime are often longer than parents expect, so a baby who's fighting bedtime may actually need a touch more awake time, not less.

Protect the room and keep nights boring

Dark room, steady white noise, comfortable temperature: the same fundamentals that anchor good sleep matter even more when everything else is in flux. Keeping the environment identical night to night gives your baby a reliable set of cues to lean on while their inner world is busy changing. And when you do go in, keep the lights off and the interaction minimal so nighttime stays clearly distinct from playtime.

How It Differs From 4 Months

People lump all regressions together, but the 4-month and 8-to-10-month versions are quite different animals.

The 4-month shift is a genuine, permanent reorganization of how your baby sleeps, which is why it's often the moment families focus on sleep skills. Our 4-month regression guide digs into that. The 8-to-10-month regression, by contrast, is a temporary storm you mostly ride out, holding your routine steady until the milestones settle and sleep returns.

The practical upshot changes your strategy. At 4 months, the most productive move is usually to help your baby learn to fall asleep more independently, because that skill will serve them through the new sleep architecture they now have for life. At 8 to 10 months, the most productive move is patience plus consistency: you're not trying to teach a brand-new skill so much as protect the good habits your baby already has while their development races ahead. If your baby had solid sleep before this regression, they will almost certainly return to it. Your job is to make sure that the way you help them through these weeks doesn't quietly create a new problem to solve later.

Hang in there. A few weeks of interrupted sleep feels endless in the moment, but this particular regression has one of the clearest silver linings of the first year: every wake-up is powered by your baby learning to move, to think, and to love you enough to miss you when you leave the room. Keep the routine steady, respond with calm warmth, and this too will pass.

Ride out the regression with a plan

Hushly keeps your routine and wake windows on track through the wobbliest weeks, so you can reassure your baby without accidentally starting new habits. Free to download.

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Frequently asked questions