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Baby handbook

Sleep from 9 to 12 months

Sleep4 min read

Two naps is the usual pattern, and the move toward one nap is usually still ahead of you.

The last quarter of the first year is busy. Babies crawl, pull up, cruise, and sometimes say a word that might have been “dog.” Sleep has to share the brain with all of that. Most babies this age are on two naps, with wake windows around 3 to 4 hours, and a night that is longer than the day. The drop to one nap is a toddler project for most children, closer to 13 to 18 months. A few are ready earlier. Most are not ready at 9 months, even if a nap was skipped once on a Saturday.

A two-nap day

Time block Activity
7:00 Wake, milk, breakfast, play
10:00 to 11:30 Morning nap. Wake windows are often about 3 hours before this nap.
11:30 Lunch, milk, play, an outing if you have one
2:30 to 4:00 Afternoon nap. This one sometimes shortens first.
4:00 Snack, play, wind down
7:00 to 7:30 Bed, after a feed if your baby still wants one

If the afternoon nap shrinks to 30 minutes, protect bedtime rather than adding a late catnap that steals the night. A baby who wakes from the second nap at 4:30 can often make it to a 7:00 bed. A baby who wakes at 5:15 may need a 6:30 bed for a while. That earlier bed is temporary scaffolding, not a life sentence.

Standing in the crib

Pulling to stand is exciting and inconvenient. Many babies stand up and then cry because sitting back down is a separate skill. Practice during the day: from standing at the couch, help them bend a knee and fold down, and cheer the clumsy version. At night, you may lay them down a few times. Keep the response boring and brief. The skill sticks within days or a couple of weeks for most babies. A crib mattress on the lowest setting matters as soon as they can pull up. Move it down before you think you need to.

The crib stays bare. A baby who is cruising does not need a pillow or a blanket yet. Sleep sacks that let the feet move are still the right cover. If your baby is climbing out, that is a sign to talk about a floor bed or a low mattress plan with an eye on safety, not a sign to add bumpers.

Separation, again

A wave of wanting you at bedtime is common around 9 to 10 months, even in babies who had been settling easily. It lines up with a sharper sense that you can leave. A consistent phrase, a consistent chair or no chair, and a consistent lights-out time are the tools. Changing the plan every night, because one night was hard, keeps the question open. If a caregiver other than you does bedtime, let them use the same sequence. Babies can learn two people’s versions of the same routine.

Night wakes for comfort are common during this wave. A feed is still reasonable if your baby takes a full feed and your clinician is happy with growth. A wake that turns into a party, with babbling and pulling up, is often a sign the last wake window was too long or the room became interesting. Dim, boring, and brief is the reply.

Milk, meals, and sleep

By now there are usually three meals and maybe a snack, plus breast milk or formula. A dropped bottle does not have to mean a dropped cuddle at bedtime. If you are weaning a bedtime bottle, replace the sucking with the rest of the routine rather than with a new sleep crutch you do not like. Water in a cup with dinner is fine. A bottle of milk in the crib is not, because of both safety and teeth.

Total sleep still hovers around 12 to 14 hours for many babies, with about 11 hours of that at night when things are going well, and 2 to 3 hours in naps. Some need more day sleep, some less. The chart in your app, looked at across two weeks, will tell you more than any single recommended number.

When to look closer

Snoring most nights, long pauses in breathing, or a baby who sweats heavily in a cool room and still seems tired all day deserves a medical look, not a stricter bedtime. So does a sudden change with fever, fewer wet diapers, or a baby who is much harder to wake than usual. Ordinary protests at bedtime are loud and healthy. A baby who is limp, working to breathe, or not themselves is a call to the pediatrician or to emergency care.

Sources

This guide is general information for families, not medical advice, and it is not a substitute for your pediatrician.

This Baby handbook page is general information, not medical advice. When in doubt, call your pediatrician.