A one-week-old baby sleeps roughly 14 to 17 hours in a 24-hour period, though the normal range stretches from about 9 to 18 hours. That sleep comes in short, unpredictable bursts spread across day and night, with no real pattern yet. If it feels chaotic, that’s because it is, and it’s completely normal.
How Those Hours Break Down
Unlike adult sleep, which happens in one long block at night, a one-week-old’s sleep is scattered into many short episodes. Each stretch typically lasts anywhere from 30 minutes to about 3 hours, punctuated by feeding. Your baby doesn’t yet have a schedule, and expecting one at this stage will only frustrate you.
About half of a newborn’s total sleep time is spent in active sleep, the infant version of REM. During active sleep, you’ll notice twitching eyelids, irregular breathing, small jerky movements, and even facial expressions that look like smiles or grimaces. This is normal brain development happening in real time. The other half is quiet sleep, where your baby lies still and breathes more evenly. A single sleep cycle for a newborn is much shorter than an adult’s, which is one reason they wake so frequently.
Why Day and Night Don’t Exist Yet
One-week-old babies cannot distinguish between day and night. Their internal clock, or circadian rhythm, hasn’t developed. In the womb, your baby’s sleep cycles began forming during the final months of pregnancy, with active sleep developing first and quiet sleep following later. But the hormonal signals that tell adults to feel sleepy when it’s dark simply aren’t functioning yet in a newborn.
This means your baby is just as likely to sleep for a long stretch at noon as at midnight, and just as likely to be wide awake at 3 a.m. as at 3 p.m. Most babies don’t start sorting out day from night until around 6 to 8 weeks, and a mature circadian rhythm takes even longer. In the meantime, you can gently encourage the process by keeping daytime bright and active, and nighttime dim and quiet, but don’t expect results this early.
Wake Windows Are Tiny
A one-week-old can only stay awake for about 30 to 60 minutes at a time before needing to sleep again. That window includes feeding, diaper changes, and any interaction. It’s shorter than most new parents expect. If your baby has been awake for over an hour and seems fussy, overtiredness is the likely culprit. Watching for early sleep cues like yawning, turning away from stimulation, or clenching fists can help you catch the window before it closes.
Feeding Drives the Sleep Schedule
At one week old, hunger is the primary reason your baby wakes up. Newborns need to eat every 2 to 3 hours, and sometimes more frequently, especially breastfed babies whose stomachs empty faster. This feeding frequency is what chops sleep into short blocks.
In the first week, pediatricians generally recommend waking your baby to feed if they’ve slept longer than about 3 hours, particularly until they’ve regained their birth weight. After that milestone (usually by 10 to 14 days), many providers give the green light to let your baby sleep until they wake on their own, though feeding frequency should still stay high during the day. If your baby is difficult to rouse for feedings consistently, that’s worth mentioning to your pediatrician.
Sleep Bursts and Growth Spurts
You may notice days when your one-week-old seems to sleep far more than usual. Research published through the American Academy of Sleep Medicine found that infants experience irregular bursts of sleep, with total daily sleep jumping by an average of 4.5 extra hours for about two days at a time. The number of naps also spiked, with babies taking roughly three additional sleep episodes per day during these bursts.
These sleep surges are linked to physical growth. Growth spurts in body length tended to occur within 48 hours of the extra sleep. Each additional hour of sleep increased the probability of a measurable growth spurt by about 20 percent, and each extra nap increased it by 43 percent. The connection wasn’t perfect; sometimes extra sleep happened without growth, and some growth spurts occurred without a sleep burst. But if your newborn suddenly seems to sleep constantly for a day or two, growth is a likely explanation.
Normal Sleepiness vs. Concerning Lethargy
Because newborns sleep so much, it can be hard to tell whether your baby is just being a normal sleepy newborn or showing signs of a problem. The key distinction is what happens when your baby is awake. A healthy one-week-old, when alert, will feed well, respond to sounds and faces, and can be comforted when crying. They may sleep heavily, but they wake up and engage.
Lethargy looks different. A lethargic baby appears to have little energy even when awake, is hard to rouse for feedings, and doesn’t respond to sounds or visual stimulation the way they normally would. They seem drowsy and sluggish rather than simply sleepy. Lethargy can signal infection, low blood sugar, or dehydration. If your baby is consistently difficult to wake and seems “floppy” or unresponsive when you do get them up, that warrants prompt medical attention.
Safe Sleep at One Week
With so many hours spent sleeping, how your baby sleeps matters as much as how long. Current guidelines from the AAP, supported by the CDC, are straightforward:
- Always on their back. Every sleep, whether a nap or nighttime, should be on the back. Side sleeping and stomach sleeping increase the risk of sleep-related death.
- Firm, flat surface. Use a safety-approved crib or bassinet with a firm mattress and a fitted sheet. No inclined sleepers, pillows, blankets, stuffed animals, or bumper pads.
- Same room, separate surface. Room-sharing (keeping the crib or bassinet in your bedroom) is recommended for at least the first 6 months. Bed-sharing is not the same thing and is not recommended.
These guidelines apply to every sleep, including the short naps that happen after daytime feedings. It’s tempting to let a one-week-old snooze in a car seat, swing, or on your chest, but unsupervised sleep on any surface other than a firm, flat one carries risk. If your baby falls asleep in a carrier or car seat, transferring them to their crib as soon as practical is the safest move.