Yes, many babies experience a sleep regression around 11 months, though it isn’t as universally recognized as the 4-month or 8-month regressions. Not every baby goes through it, but those who do typically face a temporary stretch of nighttime waking, nap resistance, or difficulty falling asleep that lasts anywhere from two to six weeks.
Why Sleep Falls Apart at 11 Months
At 11 months, your baby’s brain is juggling an enormous number of new skills at once. They’re learning to pull up to standing, cruise along furniture, and possibly take early steps. Many are also making big cognitive leaps: imitating sounds, saying their first words, and beginning to understand that you still exist when you leave the room. All of that mental and physical work doesn’t shut off at bedtime. Babies at this age often wake in the night and immediately start practicing standing in the crib, or they fight sleep because their brains are too wired to wind down.
Separation anxiety also peaks between 9 and 18 months. According to Children’s Hospital of Philadelphia, this is a completely normal and healthy milestone. Your baby has formed a strong attachment to you and genuinely misses you when you’re out of sight. At bedtime, that translates into protest crying, difficulty being put down, and more frequent calls for comfort overnight.
Teething can pile on, too. Many 11-month-olds are cutting their upper lateral incisors or first molars, and the discomfort tends to flare at night when there are fewer distractions.
Teething or Regression: How to Tell
Because teething and developmental regressions often overlap at this age, it helps to look at the physical signs. Teething typically shows up as red or swollen gums, increased drooling, excessive chewing, and intermittent crying that comes and goes with the pain. A mild fever under 101°F can also appear. Sleep regression, on the other hand, tends to arrive alongside a sudden new motor or cognitive skill. The crying is more of a protest than a pain response, and your baby may seem more alert and wired rather than uncomfortable.
If you’re seeing both swollen gums and a new physical milestone, you’re likely dealing with both at once. That’s common and doesn’t mean anything is wrong. It just means you may need to address comfort for the gums while also staying consistent with your sleep routines.
The Nap Trap at 11 Months
One of the trickiest parts of the 11-month regression is that it can look like your baby is ready to drop to one nap. They start refusing the second nap, or the morning nap shifts later and later, and it feels logical to just consolidate. But most children aren’t truly ready for a single nap until 14 to 18 months.
What’s actually happening around 11 to 12 months is that babies need slightly longer stretches of awake time between naps, often moving from about 3 to 3.5 hours up to 3.5 to 4 hours. Extending those wake windows builds enough sleep pressure for your baby to fall asleep and stay asleep, without dropping a nap entirely. If you cut to one nap too early, the resulting overtiredness can actually make sleep worse: more night waking, earlier morning wake-ups, and increased fussiness during the day. It becomes a cycle that’s harder to break than the regression itself.
If your baby refuses the second nap for a few days but then takes it again, that’s a sign the regression is driving the refusal, not a genuine readiness for one nap. Keep offering two naps with slightly stretched wake windows, and most babies settle back into the pattern within a few weeks.
How Long It Lasts
Most sleep regressions resolve within two to six weeks. The 11-month regression tends to fall on the shorter end for families who maintain consistent sleep habits throughout the disruption. That doesn’t mean nothing changes. You may need to offer extra comfort, spend a few more minutes settling your baby at bedtime, or respond to overnight waking you hadn’t been dealing with. The key is doing those things without introducing entirely new sleep associations (rocking to sleep every night, bringing baby to your bed for the first time) that you’ll need to undo later.
Babies in this age range need 12 to 16 total hours of sleep in a 24-hour period, including naps. If your baby’s total is dropping well below that range and staying there for more than a couple of weeks, the issue may be something beyond a standard regression.
What Actually Helps
Keeping wake windows consistent but slightly longer is the single most effective adjustment. Beyond that, a predictable bedtime routine matters more during a regression than at almost any other time, because your baby’s world feels unpredictable to them right now. The same sequence of events each night (bath, pajamas, book, lights out) gives their brain a reliable signal that sleep is coming.
For separation anxiety specifically, brief and calm goodbyes at bedtime work better than drawn-out reassurance. Lingering in the room or repeatedly coming back can reinforce the idea that bedtime is something to be negotiated. A short, warm phrase you repeat every night (“I love you, time for sleep”) gives your baby a predictable endpoint.
During the day, give your baby plenty of floor time to practice their new physical skills. A baby who has had ample time to work on standing and cruising during waking hours is less likely to treat 2 a.m. as practice time. If teething is part of the picture, a chilled teething ring before bed or gentle gum massage can take the edge off enough to let sleep happen.
The regression ends. Your baby’s brain is building new architecture right now, and disrupted sleep is a byproduct of that construction. Once the new skills feel routine and the developmental leap settles, sleep patterns typically return to where they were before, sometimes even better than before.