Newborns should always sleep on their backs, on a firm and flat surface, with no loose bedding, pillows, or soft toys in the sleep area. That single set of practices is the foundation of safe infant sleep and the most important thing to get right. Since the widespread adoption of back sleeping, SIDS rates have dropped by roughly 40 to 48 percent.
Back Sleeping Is Non-Negotiable
Every time your newborn goes down to sleep, whether for a nap or at night, they should be placed flat on their back. This applies even if your baby seems to sleep more soundly on their side or stomach. Prone (stomach-down) and side sleeping positions are directly linked to a higher risk of sudden infant death syndrome. The shift toward back sleeping over the past few decades is one of the most successful public health changes in pediatric medicine, associated with a 40 to 48 percent reduction in SIDS deaths in countries that tracked the change.
Once your baby can roll independently in both directions, you don’t need to reposition them if they flip over during sleep. But you should still place them on their back at the start of every sleep period.
The Right Sleep Surface
Your baby’s sleep surface should be firm, flat, and specifically designed for infants. That means a safety-approved crib, bassinet, portable crib, or play yard with a snug fitted sheet. Nothing else belongs in the sleep space: no blankets, no pillows, no bumper pads, no stuffed animals. These items can cover a baby’s face and restrict breathing.
Inclined sleepers, car seats, swings, and bouncers are not safe for unsupervised sleep. If your baby falls asleep in one of these, move them to a flat surface as soon as you can. The firmness of the mattress matters because soft surfaces can conform around a baby’s face and create a pocket that traps exhaled air.
Room Sharing Without Bed Sharing
The AAP recommends that your baby sleep in your room, close to your bed but on their own separate surface, for at least the first six months. Room sharing makes nighttime feeds easier and lets you monitor your baby, but bed sharing introduces serious risks. Adult mattresses, pillows, and blankets are all hazards for an infant, and there’s a risk of a sleeping adult rolling onto the baby. A bassinet or mini crib next to your bed is the ideal setup.
Swaddling Safely
Swaddling can help calm a newborn and reduce the startle reflex that wakes them, but it needs to be done correctly. The blanket should be snug around the arms and chest but loose enough around the hips that your baby can bend their legs freely. Wrapping the legs too tightly and straight can lead to hip problems, including hip dysplasia.
The critical rule with swaddling is timing: stop as soon as your baby shows any sign of trying to roll over. Some babies begin working on rolling as early as two months. Once rolling starts, a swaddled baby who flips onto their stomach can’t use their arms to push up or reposition, which creates a suffocation risk. At that point, switch to a wearable sleep sack that leaves the arms free.
How Much Newborns Actually Sleep
Most newborns sleep somewhere between 11 and 17 hours per day, but this is spread across many short stretches rather than long blocks. There’s no standard recommendation for exactly how many hours a newborn needs because the variation at this age is enormous. Some babies clock 11 hours, others 17, and both can be perfectly normal.
Newborns don’t yet distinguish day from night. Their internal clock, driven by the hormone melatonin, doesn’t develop a reliable day-night rhythm until around 6 to 12 weeks of age. Before that, sleep is scattered fairly evenly across the 24-hour period. This is also why newborns wake so frequently to eat. A newborn’s stomach holds only about 20 milliliters at birth (less than an ounce), and human milk empties from the stomach in roughly an hour, so very frequent feeding and short sleep cycles are biologically normal in the early weeks.
Around three to six months, babies begin consolidating more of their sleep into nighttime hours. Until then, the irregular schedule isn’t a problem to solve. It’s just how newborn biology works.
What Newborn Sleep Looks Like
If your newborn twitches, grimaces, or moves their eyes under their lids while sleeping, that’s completely normal. Newborns spend about 60 percent of their sleep time in active sleep (the infant equivalent of REM sleep), compared to roughly 20 to 25 percent in adults. During active sleep, babies may twitch their fingers, make sucking motions, flutter their eyelids, or breathe irregularly. This doesn’t mean they’re uncomfortable or waking up. Active sleep is important for brain development.
The remaining sleep time is split between quiet sleep, where the baby is still and breathing evenly, and brief transitional periods between the two. A single sleep cycle for a newborn lasts roughly 45 to 60 minutes, much shorter than an adult’s 90-minute cycle. This means they cycle through light sleep frequently, which is one reason they wake so easily.
Recognizing When Your Baby Is Tired
Putting your baby down at the first signs of drowsiness, rather than waiting until they’re overtired, makes falling asleep easier. Early cues show up on the face first: yawning, droopy eyelids, staring into the distance, furrowed brows, or a frown. Body language follows shortly after, including rubbing their eyes, pulling on their ears, sucking their fingers, or clenching their fists.
If you miss these early signals, an overtired baby often becomes harder to settle. They may arch their back, become fussy, or cry inconsolably. Learning to spot the early drowsiness window takes a bit of practice, but it’s one of the most useful skills for managing newborn sleep in those first few months.
Pacifiers and Temperature
Offering a pacifier at nap time and bedtime is associated with a lower risk of SIDS. If you’re breastfeeding, it’s generally fine to wait until nursing is well established before introducing one. If the pacifier falls out after your baby falls asleep, you don’t need to put it back in.
For room temperature, keep the room at a level that feels comfortable for a lightly dressed adult. Overheating is a risk factor for SIDS, so dress your baby in one layer more than what you’d wear comfortably in the same room. If your baby’s chest feels hot or sweaty, they’re likely overdressed. Hats should not be worn indoors during sleep, as babies release excess heat through their heads.