Most babies don’t start sleeping through the night until around 3 months old, and “sleeping through the night” typically means a stretch of 6 to 8 hours, not the 10 or 11 hours adults often imagine. Getting there involves a combination of biological readiness, the right sleep environment, consistent routines, and appropriate expectations for your baby’s age. Here’s what actually works.
What “Sleeping Through the Night” Really Means
When pediatricians say an infant sleeps through the night, they mean a continuous stretch of 6 to 8 hours without needing a parent’s help to fall back asleep. Babies still wake briefly between sleep cycles, just like adults do. The difference is whether they can settle themselves back down or whether they cry for you.
At 3 months, some babies can manage that 6-to-8-hour stretch. By 6 months, many more can. But there’s a wide range of normal, and a baby who was sleeping long stretches at 4 months may start waking again at 6 months. That’s not a failure on your part.
When Babies Can Go Without Night Feeds
Hunger is the most common reason young babies wake at night, and you can’t sleep-train your way past a genuinely hungry infant. The timeline for dropping night feeds depends on how your baby is fed. Formula-fed babies can generally go without night feeds starting around 6 months, because formula digests more slowly and they’re getting enough calories during the day. Breastfed babies often still need a night feed longer. Most healthy breastfed children are getting enough daytime nutrition to drop night feeds around 12 months.
If your baby is under these thresholds and waking to eat, that’s normal biology, not a sleep problem. Trying to eliminate feeds before a baby is ready usually backfires: you get a baby who’s too hungry to settle and a parent who’s more exhausted than before.
Build a Short, Consistent Bedtime Routine
A predictable sequence of activities before bed is one of the most effective tools for improving infant sleep, and it works faster than most parents expect. Research published in the journal Infant Behavior and Development found that sleep disturbances in infants and toddlers improved within just a few nights of starting a consistent bedtime routine that included a bath, a massage, and quiet activities like reading or singing.
The specific activities matter less than doing them in the same order every night. A routine that works well for most families looks something like this:
- Bath: Even a short warm bath signals a transition from daytime activity to sleep.
- Pajamas and diaper change: Another physical cue that bedtime is approaching.
- Feeding: A full feed near the end of the routine helps ensure your baby isn’t hungry.
- Book or song: One short book or a lullaby in a dimmed room, then into the crib drowsy but awake.
Keep the whole routine under 30 minutes. The goal is a clear, repeatable signal that it’s time to sleep. Doing this at roughly the same time each evening helps set your baby’s internal clock.
Get Wake Windows Right
One of the biggest reasons babies fight bedtime or wake frequently is being overtired or undertired, and the fix is matching their awake time between naps to their age. These windows, based on Cleveland Clinic guidelines, give you a target range:
- 3 to 4 months: 1.25 to 2.5 hours awake between sleeps
- 5 to 7 months: 2 to 4 hours
- 7 to 10 months: 2.5 to 4.5 hours
- 10 to 12 months: 3 to 6 hours
An overtired baby produces stress hormones that make it harder to fall asleep and stay asleep. If your baby is rubbing their eyes, yawning, or getting fussy, you’ve likely pushed past the ideal window. On the other hand, a baby who napped too late in the afternoon won’t be tired enough for an early bedtime. Watching for sleepy cues and tracking awake times gives you the clearest picture of when your baby is ready for sleep.
Set Up the Right Sleep Environment
The room itself plays a bigger role than many parents realize. The Lullaby Trust recommends keeping the room between 16 and 20°C (roughly 61 to 68°F). Babies who are too warm sleep more restlessly and face increased safety risks. A good rule of thumb: dress your baby in one more layer than you’d wear comfortably in that room.
Darkness matters. Even small amounts of light can interfere with the production of sleep-promoting hormones. Blackout curtains or shades help, especially in summer months or if streetlights shine into the room. White noise can also be useful for masking household sounds, though keep the machine across the room from the crib and at a moderate volume.
For safety, place your baby on their back on a firm, flat mattress with only a fitted sheet. No blankets, pillows, stuffed animals, or bumper pads. A bare crib is the safest crib. Babies should sleep in their own space (a crib, bassinet, or portable play yard) rather than on a couch, armchair, or adult bed. Room-sharing for the first several months is fine and can make night feeds easier, but the baby needs their own sleep surface.
Consider a Dream Feed
A dream feed means gently feeding your baby (without fully waking them) right before you go to bed yourself, usually around 10 or 11 p.m. The idea is to top off their stomach so they sleep a longer stretch that overlaps with your own sleep.
The evidence here is promising but not rock-solid. A longitudinal study tracking 313 infants found that babies who received a focused bedtime feed at one month old slept substantially longer stretches by 6 months. When researchers measured sleep with ankle monitors, those babies averaged 62 additional minutes in their longest overnight sleep bout compared to babies who didn’t get the focused feed. That’s an extra hour of unbroken sleep, which for a tired parent can feel transformative.
Dream feeds don’t work for every baby. Some wake up too much during the feed and then struggle to resettle. Others seem uninterested in eating. It’s worth trying for a week or so to see if it extends your baby’s longest stretch. If it doesn’t make a noticeable difference, you can drop it.
Putting Baby Down Drowsy but Awake
This is the single skill that makes the biggest difference in whether a baby can connect sleep cycles on their own at night. If your baby always falls asleep while being rocked, fed, or held, they learn to associate those conditions with falling asleep. When they naturally wake between sleep cycles at 2 a.m., they need those same conditions to get back to sleep, which means they cry for you.
Putting your baby down when they’re sleepy but still slightly awake gives them the chance to practice falling asleep independently. This doesn’t have to mean leaving them alone to cry. You can stand nearby, pat their chest, or shush quietly. The key is that the final step of falling asleep happens in the crib, not in your arms. Some babies pick this up in a few days. Others take weeks of patient, gradual practice.
Sleep Regressions Are Normal and Temporary
Just when you think you’ve figured things out, your baby may start waking more frequently. Sleep specialists identify roughly six regression phases: at 4, 6, 8, 12, 18, and 24 months. Each one ties to a developmental shift happening in your baby’s brain and body.
The 4-month regression is often the most jarring because it represents a permanent change in how your baby’s sleep cycles work. Before 4 months, babies cycle through sleep differently than adults. Around this age, their sleep architecture matures, which initially causes more wake-ups but eventually leads to more adult-like sleep patterns. At 6 months, regressions often relate to hunger from increased physical activity like scooting and crawling. At 12 months, it’s growing awareness of the world. At 18 months, shifts in circadian rhythm play a role. And at 24 months, nighttime fears, potty training, or a new sibling can disrupt sleep.
The most important thing during a regression is to avoid introducing new sleep habits you don’t want to maintain long-term. If you start bringing your toddler into your bed during a regression, that can quickly become the new expectation. Stay as consistent as possible with your established routine, offer comfort, and give it one to three weeks. Most regressions resolve on their own.
A Realistic Timeline
If you’re starting from scratch with a baby who wakes frequently, expect gradual improvement over one to four weeks of consistency, not an overnight fix. Younger babies (under 4 months) are often not developmentally ready to sleep long stretches regardless of what you do. Between 4 and 6 months is when most families see the biggest gains from establishing routines and practicing independent sleep skills. By 9 to 12 months, most healthy babies are physically capable of sleeping 10 to 12 hours overnight, though not all of them will without some gentle guidance.
Progress rarely looks like a straight line. You’ll have good nights and bad nights. A cold, a new tooth, or a vacation can set things back temporarily. What matters is returning to your consistent routine once the disruption passes. Babies are surprisingly adaptable when they have a predictable framework to come back to.