There is no officially recognized “10-month sleep regression” in pediatric medicine, but many babies do experience a noticeable disruption in sleep around this age. What parents call the 10-month regression is typically part of a broader phase of developmental change that can surface anywhere between 8 and 12 months. It usually lasts 2 to 6 weeks, though the timing varies from baby to baby.
Many experts are uncomfortable labeling sleep regressions by specific months because these disruptions happen sporadically rather than on a predictable schedule. What matters more than the label is understanding why your baby’s sleep has fallen apart and what you can do about it.
Why Sleep Falls Apart Around 10 Months
Several developmental changes converge in the 8 to 12 month window, and any combination of them can disrupt a baby who was previously sleeping well.
The most visible change is physical. Around 10 months, babies are learning to pull themselves to standing, cruise along furniture, and move in and out of different positions to reach toys. These are exciting new skills, and babies often practice them at the worst possible time: in the crib, at 2 a.m. A baby who pulls to standing but can’t figure out how to sit back down will cry for help, sometimes multiple times a night.
Separation anxiety is the other major factor. It typically emerges between 6 months and 3 years, but it tends to peak in intensity during the second half of the first year. At 10 months, your baby understands how dependent they are on you and feels less safe without you nearby. That awareness makes bedtime harder. Being placed in a dark room alone can feel genuinely distressing in a way it didn’t a few months earlier.
There are also cognitive shifts happening beneath the surface. Research has linked this period to major changes in mental capacities. Your baby’s brain is busy processing new information about language, object permanence, and cause and effect. More fragmented sleep during this stage has been moderately associated with differences in cognitive development scores, suggesting that the brain activity driving these wakings is real and significant, not just a behavioral phase.
What It Looks Like
The 10-month regression doesn’t look the same in every baby, but common patterns include fighting naps (sometimes refusing one entirely), taking much longer to fall asleep at bedtime, waking multiple times overnight after weeks or months of sleeping through, and standing or crawling in the crib instead of settling down. Some babies cycle through all of these. Others only experience one or two.
One of the trickiest features of this age is the “nap strike,” where a baby who has been reliably taking two naps suddenly refuses the second one. This can look like a signal to drop to one nap, but at 10 months, that’s almost always too early. Most babies still need two naps a day at this age.
Are Night Feeds Still Necessary?
If your baby is waking more often at night, you might wonder whether hunger is part of the equation. For formula-fed babies over 6 months, nighttime hunger is unlikely to be the cause of wakings. Formula digests slowly enough that a well-fed baby can go through the night without additional calories.
For breastfed babies, the picture is a bit different. Night weaning before 12 months can reduce your milk supply, so continuing to nurse overnight is reasonable if that’s part of your routine. But it’s worth recognizing that many overnight wakings at this age are about comfort and connection, not calories. A baby who was sleeping through the night and suddenly starts waking again is almost certainly waking for developmental reasons, not because their nutritional needs changed overnight.
How to Handle the Regression
The single most important thing you can do is stay consistent. If your baby had a routine that was working before the regression, keep it in place. Introducing new sleep crutches (rocking to sleep, bringing baby into your bed, offering extra feeds) to get through the rough patch can create habits that outlast the regression itself. If your baby is healthy and safe, giving them time and space to work through what they’re feeling is often the most effective approach.
Managing Nap Refusals
When your baby refuses a nap, put them down for about an hour. If they don’t sleep, get them up and move on with the day. You’ll want to make sure they don’t fall asleep, or even get drowsy, at any point before bedtime. If the missed nap leaves a long stretch before bed, you can move bedtime up, but no more than 30 minutes earlier. Shifting it further than that tends to trigger early morning waking, which creates a new problem.
You can also try pushing the refused nap about 30 minutes later. At 10 months, most babies do well with 3 to 3.75 hours of awake time between sleep periods. If your baby’s wake windows have grown but their schedule hasn’t adjusted, that mismatch alone can cause nap resistance.
Helping With Separation Anxiety at Bedtime
Short, predictable goodnight routines help signal that separation is temporary. Keep the routine the same every night so your baby learns what to expect. During the day, brief practice separations (leaving the room for a moment and returning cheerfully) can build your baby’s confidence that you always come back. Avoid sneaking out of the room after your baby falls asleep. If they wake and discover you’ve disappeared, it reinforces the anxiety rather than easing it.
Practicing New Motor Skills During the Day
If your baby keeps standing up in the crib, give them plenty of opportunities to practice pulling up and sitting back down during daytime play. The faster they master the skill of getting back down from standing, the less likely they are to get stuck upright in the middle of the night. This won’t eliminate overnight wakings, but it shortens the phase.
How Long It Lasts
Most sleep regressions resolve within 2 to 6 weeks. Some babies bounce back to their previous sleep patterns in under two weeks, while others take closer to six. The regression tends to end once the underlying developmental leap settles, whether that’s mastering a new physical skill, adjusting to separation anxiety, or simply finishing a period of rapid brain development.
If sleep disruptions continue well beyond six weeks, the issue may have shifted from a temporary regression to a longer-term sleep habit change. That’s a sign to look at the overall schedule, wake windows, and bedtime routine rather than waiting for the phase to pass on its own.