Sleeping through the night

Help your baby to sleep through the night!

Sep 21, 2022
9 min read

This is what we all aspire to isn't it? The golden trophy of parenthood: your baby "sleeping through the night".

Your neighbour’s baby slept through from 6 weeks old, your sister-in-law's baby has to be woken every morning or she'd keep sleeping! You’re wondering if there is a light at the end of the tunnel for your baby or if you’ve missed the boat entirely…

We can help you.

But first, a disclaimer: we're NOT telling you your baby must be able to sleep through the night by a certain age, nor that you should expect your newborn to do a full 12 hours straight.

Many people like to comment on articles like this saying "babies aren't supposed to sleep all night", and do you know what? NOBODY sleeps all night. All humans big or small rouse between sleep cycles all night long.

With babies, it does take a while to learn the skill of sleep but it doesn't mean they are not capable of sleeping longer stretches if all the factors line up right for them. This article is about ticking all the boxes to give your baby the best chance of sleeping better at night, when they're ready to.

In this article:

  • What does "sleeping through the night" mean?
  • When do babies sleep through the night?
  • How to get your baby to sleep through the night
  • Reasons your baby might be waking at night

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What does "sleeping through the night" mean?

You might be surprised to learn that "sleeping through the night" doesn't actually mean sleeping right through from bedtime to morning without waking. Most research actually defines "sleeping through the night" as sleeping for 6 to 8 hours straight.

So if your baby is only waking once overnight, that means they are already doing it. They are "sleeping through the night", woohoo! Even if your baby is waking twice, if they are managing a 6 hour stretch of sleep in between those wakes, they too are technically "sleeping through the night".

Not quite what you imagined?

You're not alone! Most parents do think of "sleeping through the night" as sleeping right through from bedtime until morning. And that is still achievable, but it does take a little longer...

When do babies sleep through the night?

A baby’s ability to sleep through the night depends on many factors – their daily milk and food intake, their sleep environment, how much day sleep they’ve had, whether they’re able to settle themselves to sleep (in babies older than 4 months)... and more! ⁠

If all of those factors are lined up though, it is entirely possible for a baby as young as 6 weeks old to sleep for a solid 6-8 hours, or even longer, overnight. It can, and does, happen! In fact, when I brought my youngest baby home from hospital, she slept for 9 hours straight every night, going to bed at 7pm and waking for a feed around 4am.

Now, whenever we talk about newborn babies sleeping for long periods overnight we get comments saying "you can't let a newborn sleep that long at night, you should be waking your baby to feed them". And yes, for some babies this is true.

If your baby hasn't regained their birth weight or if they are having trouble feeding or gaining weight, your doctor or health nurse will probably recommend that you wake your baby to feed them every 3-4 hours at night. If you've been given the all clear from your medical team though and your baby is gaining weight well, there's no reason to wake them. They will wake naturally for a feed when they are hungry.

Again, a disclaimer - we're NOT saying you should expect your baby to sleep through the night from a young age. Some babies are capable of this, if everything is lined up just right, but most babies will still wake for 1-2 night feeds until they are well-established on solids, which may not be until closer to 8 months old.

So if your baby has just turned 5, 6, 7 months old and they're not sleeping through the night yet, don't worry, they will get there! Every baby sleeps through the night in their own time.

All you can really do is make sure everything is lined up to give your baby the best possible chance at sleeping longer... the rest is up to them!

How can I get my baby to sleep through the night?

There are many factors that contribute to your baby sleeping well at night, some are within your control and some are not, for example, your baby's age, size or developmental ability.

Let’s take a look at the factors you DO have control over, in the hope that it might help you and your baby towards a full night sleep.

Make sure your baby has a full tummy!

Feeding your baby enough during the day will mean they need to feed less at night, since babies have a specific number of calories they need to consume within a 24-hour period.

If you have an overly sleepy baby or let them nap too much in the day they won’t have fed as much as they need to and will have to make up for that during the night. Hungry babies also don’t settle or sleep well. So making sure your baby has had enough milk/solids in the day really helps their chances of sleeping at night.

For babies under 6 months, you can try implementing a "dream feed" to help them sleep for longer. This is where you feed your baby before you go to bed, while they are still drowsy or asleep.

For babies established on solids, giving them protein at their LUNCH meal can also help them stay full through the night, due to the way the protein is stored in your baby’s liver at this time.

Remember that most babies will still need to have milk in the night until they are well established on solids, and this might not happen until closer to 8 months old. This is completely normal! If your baby is feeding overnight and still having a good breakfast milk feed the next morning, this indicates that they are waking genuinely hungry at night.

Has your baby had too much or too little day sleep?

An overtired baby who hasn’t had enough sleep during the day will be harder to settle and can sleep worse. This is due to a build up of the stress hormone cortisol, which acts like adrenaline in your baby’s body, inhibiting good quality sleep. A baby who has napped poorly will generally have a restless night’s sleep and/or an early morning wake.

On the other hand, too much day sleep can also lead to poor nights. Day and night sleep is intrinsically linked, so, quite simply, if your baby has too many of their sleep hours for that 24-hour period during the day, they will naturally sleep less at night. It is a very delicate balance!

Our Little Ones App takes the guesswork out of how much sleep is the right amount for your baby by providing age-appropriate nap schedules, along with comprehensive troubleshooting notes for when things don't go to plan.

Is your baby startling awake?

If your baby is younger than 5 months and not rolling yet, swaddling them will help to ensure they sleep more peacefully and for longer. Swaddling replicates the tight confined feeling of being in the womb that babies are used to and helps to suppress their startle reflex.

Quite often, we hear people say their baby doesn’t like being swaddled because they cry or squirm during the process. This is often due to the fact that their baby is already overtired by this stage and is literally fighting ANYTHING! It can also be because the swaddle is not the right type for them. Some babies prefer to be swaddled with their arms up and others prefer arms down.

Swaddling is proven to help your baby sleep for longer and means they can’t wake themselves up with their startle reflex so if your baby is not rolling yet, it's worth persevering to find a swaddle that works for them. Once your baby is rolling, you can transition to an arms-out baby sleeping bag.

Is your baby too hot or cold?

Babies are really sensitive to temperature, as they are unable to effectively regulate their own body temperature until they’re older. The ideal room temperature for a baby to sleep in is between 18-20 degrees Celsius (64-68 degrees Fahrenheit). Making sure your baby is nice and warm, but not too hot, is a crucial element in them sleeping well.

We recommend always dressing and swaddling your baby with natural fibers only – cotton, wool, merino or bamboo. These fabrics allow your baby’s skin to breathe and reduce the risk of them overheating. Never use polyester, fleece, polar fleece or other synthetic or man-made fabrics in your baby’s bed.

Using a baby or toddler sleeping bag is a great way to ensure your wee one stays cosy all night. These sleeping bags usually fasten at the shoulders or zip at the front, meaning your baby wears the sleeping bag sort of like a vest. If you have a wiggly sleeper, a sleeping bag is PERFECT to make sure they can’t kick their blankets off and wake cold.

When checking if your baby is warm enough in the night, always feel their core - their chest or back. It should feel warm to the touch but not hot. A baby’s head and hands are supposed to be cooler than the rest of their body when they’re sleeping, so don’t go by cool hands as an indicator of their core temperature.

Are you playing white noise at night?

Sometimes people forget about using white noise for night-time sleep as well as in the day! As with naps, white noise is a crucial element in your baby sleeping well.

When your baby is sleeping, the white noise should be about as loud as a shower. This will help to block out any external sounds that risk waking your baby up such as noisy siblings or the neighbour’s dog. Playing continuous white noise also means that your baby hears the same thing they heard when they went to sleep, which helps them transition between sleep cycles as they get older.

Is your baby's room dark?

Having a dark room with no night light will help your baby know it is still sleep time. Babies aren’t afraid of the dark and actually need the dark to kick off the production of melatonin, a hormone which helps us fall asleep and stay asleep.

Using a night light or projector in your baby’s room hinders this process and can stimulate your baby, making it hard for them to settle and resettle, just like an annoying bright alarm clock would next to your bed!

Does your baby rely on YOU to get to sleep?

This is a biggie! Once your baby is around 4 months old, their sleep cycles change and they can begin to wake fully between each cycle (every 2 hours in the night). This means that if you rocked or fed or patted them to sleep at the start of the night, they’ll begin needing this same help every time they wake between sleep cycles. See THIS article for more information on the 4 month sleep regression.  

Teaching your baby to fall asleep on their own (or self-settle) by using positive sleep associations (such as white noise, a swaddle or sleeping bag, a comforter), is your best line of defence. A baby who is relying on a parent-controlled sleep association will not be able to sleep through the night without their parent's help - it's as simple as that!

Reasons your baby might be waking at night

If you’re looking to encourage your little one to sleep longer, or even all night, then try to rule out the most common reasons that cause babies to wake at night:

  • Hunger - feed, feed, feed, especially if your baby is not established on solids yet!
  • Discomfort - they might have wind, need a nappy change, or they are uncomfortable in their bed
  • Sickness or other medical condition such as reflux or allergies
  • They need a bit more structure to their day - getting age-appropriate awake windows and nap patterns happening will really improve your little one's night-time sleep!
  • Sleep environment - rule out any issues with temperature, light, noise etc.
  • Parent-controlled sleep associations - if your little one is over 4 months, it might be time to guide them towards self-settling.

If you'd like to give your baby the best chance at sleeping through the night, take a look at our trusted sleep solutions that have helped over 200,000 families worldwide in our Little Ones App.

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Jhun, Iny et al. “Ambient Temperature and Sudden Infant Death Syndrome in the United States.” Epidemiology (Cambridge, Mass.) vol. 28,5 (2017): 728-734. doi:10.1097/EDE.0000000000000703

Colvin, Jeffrey D et al. “Sleep environment risks for younger and older infants.” Pediatrics vol. 134,2 (2014): e406-12. doi:10.1542/peds.2014-0401

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Kuo, Alice A et al. “Introduction of solid food to young infants.” Maternal and child health journal vol. 15,8 (2011): 1185-94. doi:10.1007/s10995-010-0669-5

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St James-Roberts I, Roberts M, Hovish K, Owen C. Video Evidence That Infants Can Resettle Themselves Back to Sleep After Waking in the Night, as well as Sleep for Long Periods, by 3 Months of Age. J Dev Behav Pediatr. 2015 Jun;36(5):324-9. doi: 10.1097/DBP.0000000000000166. PubMed PMID: 26035139; PubMed Central PMCID: PMC4459553.

Coons S, Guilleminault C. Development of consolidated sleep and wakeful periods in relation to the day/night cycle in infancy. Dev Med Child Neurol. 1984 Apr;26(2):169-76. PubMed PMID: 6724155.

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