Most newborns sleep 16 to 17 hours per day, often in stretches of just one or two hours at a time. That amount of sleep is completely normal. The real question isn’t how much your baby sleeps, but whether you can wake them up and whether they’re feeding well when they are awake. A baby who sleeps a lot but wakes reasonably for feedings, seems alert during awake periods, and is producing enough wet diapers is almost certainly fine.
What Normal Newborn Sleep Looks Like
Newborns don’t have a functioning internal clock yet. They can’t tell the difference between day and night, and they won’t develop a true circadian rhythm for weeks. This means their sleep comes in short, unpredictable bursts around the clock, and some babies simply sleep more than others. Sleep cycles don’t become regular until around six months of age.
Because of this, it’s easy to feel like your baby is sleeping “all the time,” especially during the first few weeks. Some newborns are naturally drowsier than others, particularly in the first 24 to 48 hours after birth and during growth spurts. Babies born slightly early (even by a week or two), babies whose mothers had long labors or received certain medications during delivery, and babies with mild jaundice all tend to be sleepier than average. None of this is automatically a problem.
The Difference Between Sleepy and Lethargic
This is the most important distinction. A sleepy baby can be woken up. It might take some effort (undressing them, changing their diaper, tickling their feet), but once awake, they’ll latch or take a bottle, make eye contact, and respond to your voice and touch. A lethargic baby is different. Lethargic babies appear to have little or no energy, are drowsy or sluggish even when “awake,” and may sleep longer than usual. They’re hard to wake for feedings, and even when their eyes are open, they don’t seem alert or attentive to sounds or visual stimulation.
If your baby fights you a little when you wake them, fusses, then eats, that’s a normal sleepy newborn. If your baby barely reacts when you undress them, won’t open their eyes, or feels floppy and limp in your arms, that’s a different situation that needs medical attention.
Feeding Benchmarks That Tell You Things Are OK
The most reliable way to know your baby is getting enough despite all that sleep is to track feedings and diapers. Breastfed newborns typically nurse every two hours (measured from the start of one feeding to the start of the next), which adds up to 10 to 12 sessions in 24 hours. Formula-fed newborns eat every two to three hours, with a minimum of eight feedings per day.
If your baby is hitting those numbers, the next checkpoint is output. In the first few days, the expected wet diaper count climbs steadily:
- Day 1: 1 wet diaper
- Day 2: 2 to 3 wet diapers
- Days 3 to 4: 3 to 4 wet diapers
- Day 5 and beyond: 6 or more wet diapers
Weight is the other key metric. It’s normal for newborns to lose up to 7% of their birth weight in the first few days, but they should regain it by day 10. Your pediatrician will track this at early checkups. A baby who is feeding well and gaining weight on schedule is getting what they need, even if they seem to sleep constantly between meals.
How to Wake a Sleepy Baby for Feeding
If your baby has gone three hours without eating (two hours for breastfed babies), it’s time to wake them. Start gentle: talk to them, sing, move their arms and legs, tickle the bottoms of their feet, or stroke their cheek. Many newborns respond to being picked up and held upright.
If that doesn’t work, undress them. Many babies hate being undressed, and the combination of physical handling and cooler air on their skin is often enough to get their eyes open. You can also try a diaper change, even if the diaper is clean. Going through the motions of unsnapping, wiping, and re-fastening can rouse a stubborn sleeper, and it works especially well for babies who tend to doze off mid-feeding.
As a last resort, a brief sponge bath can wake a deeply sleeping newborn. This is best reserved for situations where a baby is significantly overdue for a meal and nothing else has worked.
Medical Reasons a Newborn Might Sleep Too Much
Sometimes excessive sleepiness is a symptom of something that needs treatment. The most common culprit in the first week is jaundice. When a baby’s liver can’t process bilirubin (a normal byproduct of breaking down red blood cells) fast enough, it builds up in the blood and causes the characteristic yellow tint to the skin and eyes. High bilirubin levels make babies very sleepy, which creates a dangerous cycle: the baby is too drowsy to eat well, and without adequate feeding, their body can’t flush out the excess bilirubin. Signs of jaundice-related sleepiness include difficulty waking, poor sucking or feeding, and a listless appearance.
Low blood sugar is another possibility, especially in babies who are premature, small for their gestational age, or born to mothers with diabetes. Symptoms include pale or bluish skin, floppy muscle tone, poor feeding, tremors or shakiness, and breathing problems like rapid breathing or pauses in breathing. A baby who isn’t taking in enough food can’t maintain their blood sugar, which makes them sleepier, which makes them eat less. Like jaundice, this cycle can escalate quickly.
Infections in newborns can also cause unusual sleepiness. Because babies under three months have immature immune systems, any fever at all in this age group warrants a call to your pediatrician. A baby who is sleepier than usual, feels floppy, is harder to console than normal, or has trouble breathing needs prompt evaluation.
Signs That Need Immediate Attention
Most sleepy newborns are perfectly healthy. But certain combinations of symptoms should prompt a call to your pediatrician or a trip to urgent care:
- Can’t be roused: You’ve tried undressing, diaper changes, and skin stimulation, and your baby still won’t wake enough to feed.
- Missed feedings: Your baby has gone significantly longer than three hours without eating, repeatedly, and is not making up for it with larger meals.
- Low diaper output: Fewer wet or soiled diapers than expected for their age, particularly after day three.
- Yellow skin or eyes: Jaundice that seems to be getting worse, spreading from the face down the body, or appearing alongside difficulty feeding.
- Any fever under 3 months: Even a low-grade fever in a newborn requires medical evaluation.
- Breathing changes: Fast breathing, grunting, pauses in breathing, or visible effort to breathe.
- Floppiness or limpness: A baby whose muscles feel unusually loose and who doesn’t resist at all when you move their limbs.
Helping Your Baby Develop Better Sleep Patterns
You can’t train a newborn to sleep on a schedule, but you can start nudging their internal clock in the right direction. During the day, keep your baby in bright, naturally lit spaces. At night, keep things dim and quiet. When your baby wakes for a nighttime feeding, resist the urge to talk, play, or turn on lights. Feed them calmly and put them back down. Over time, this contrast between daytime stimulation and nighttime calm helps their brain build the circadian rhythm that will eventually let them (and you) sleep in longer stretches.
In the early weeks, though, the priority is making sure your baby eats frequently enough. If you need to set an alarm to wake them every two to three hours, do it. Once your pediatrician confirms your baby is gaining weight well and feeding is established, you can typically let them sleep longer stretches without waking them. For most families, that turning point comes somewhere around two to four weeks, but your baby’s healthcare provider will give you the green light based on their specific weight trajectory.