Newborn sleep, week by week
Newborns sleep a great deal — commonly fourteen to seventeen hours out of twenty-four. It just never arrives in the shape you were hoping for.
The short version. Your baby has no body clock at birth. It develops over roughly the first two to three months, which is why night sleep starts consolidating around then and not before. Nothing you did caused the first eight weeks.
Why there's no pattern at the start
Adults run on a circadian rhythm — an internal clock, cued by daylight and supported by melatonin, that tells the body when to be asleep. Babies are not born with a working one. Their own melatonin production only really begins to establish over the first couple of months, which is why a two-week-old treats four in the afternoon and four in the morning as interchangeable.
There's a second thing happening. Newborn sleep cycles are short, roughly fifty to sixty minutes, and around half of that is active sleep — the light, twitchy state where babies grunt, squirm, flutter their eyelids and make faces. It looks exactly like a baby about to wake up. Most of the time it isn't, and a great many parents pick up a baby who was going to stay asleep. Waiting a minute before intervening is often the whole trick.
Wake windows, roughly
How long a baby can comfortably stay awake between sleeps is a more useful guide than a clock time. Overtired babies fight sleep harder, so the aim is to start settling before the window closes. These are typical ranges, not targets:
- 0–4 weeks: about 45–60 minutes awake, including the feed
- 4–8 weeks: about 60–75 minutes
- 8–12 weeks: about 75–90 minutes
If your baby's window is shorter or longer than this and they're feeding well and content, that's simply your baby.
What each stretch actually looks like
Weeks 1–2
Sixteen to eighteen hours of sleep is common, taken in two to four hour blocks with no regard for time of day. Many babies are more alert at night in this period, which is disorienting but normal — some of it is thought to reflect patterns from before birth. Feeds drive everything. There is no routine to establish yet and trying to impose one mostly costs you sleep.
Weeks 3–5
Still fragmented, and often the hardest stretch. Evening fussiness tends to build towards a peak somewhere around six weeks, frequently combined with cluster feeding. Daytime sleep is short and often only happens on someone. This is the point at which most parents conclude they are doing something wrong. They usually aren't.
Weeks 6–8
The first genuine change. Circadian rhythm starts to emerge, so daylight begins to matter: bright, active days and dim, boring nights actively help now in a way they didn't at two weeks. Some babies produce one longer night stretch of four or five hours. Many don't yet. The social smile usually turns up around now, which helps morale considerably.
Weeks 9–12
Night sleep consolidates for most babies, with a longer first stretch after bedtime and more predictable daytime naps. "Sleeping through the night", as sleep researchers use the term, means a stretch of about five or six consecutive hours — not twelve. Plenty of babies reach that around three months, and plenty of perfectly healthy ones take considerably longer.
Safe sleep, briefly and seriously
This part isn't a matter of preference. The core guidance from the American Academy of Pediatrics is:
- On the back, for every sleep, until their first birthday
- On a firm, flat, separate surface — a cot, crib or moses basket with a fitted sheet
- Nothing else in the sleep space: no pillows, duvets, bumpers, positioners or soft toys
- Room-share without bed-sharing, ideally for at least the first six months
- Avoid overheating, and keep the space smoke-free
Sofas and armchairs are specifically unsafe places to fall asleep with a baby. If you think there's any chance you'll doze off during a night feed, the bed with the surface cleared is safer than the sofa. Your midwife or health visitor can talk through your specific situation.
When to ask someone
- Your baby is consistently very difficult to rouse for feeds, or sleeping through feeds in the early weeks
- Breathing during sleep sounds laboured, or there are pauses that worry you
- Sleep is worsening alongside poor feeding, poor weight gain, or fewer wet diapers
- You are so short of sleep that you're struggling to function or feel unsafe — this is a medical issue in its own right and worth saying out loud to your doctor or health visitor
What this looks like in TandemBaby
Sleep is the thing the Orbit was really built for. A day drawn as a twenty-four hour circle makes the shape of your baby's sleep visible immediately — where the long stretch sits, how fragmented the night was, whether the naps are drifting later. Reading that off a list is almost impossible; reading it off a circle takes a second.
Start a sleep timer from your wrist without putting the baby down, and let Whisper Mode take the screen dark from 10pm so a night check doesn't blind you. Over a few weeks the weekly view shows the thing you actually want to know, which is whether it's slowly getting better.
This is general information, not medical advice. Follow the guidance of your pediatrician, midwife or health visitor, who know your baby. For safe sleep specifically, follow current national guidance in your country.