Sleeping through the night

Sleeping through the night!

Apr 19, 2022
6 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…

Let us 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 (which we'll address in this article). 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.

Right, now to what the research and evidence tells us...

There are many factors that contribute to your baby sleeping well at night, some are within your control and some are baby-specific, based on their age, size or developmental ability. Let’s examine these factors in the hope it might help you and your baby towards a full night sleep.

Yes, I want more sleep!

If you need a helping hand with tackling your baby’s sleep, then check out our Pediatrician-recommended App.

Start Your Free Trial


Feeding your baby enough during the day will mean they need to feed less at night.  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 it during the night.

Hungry babies don’t settle or sleep. Making sure your baby has had enough milk/solids in the day really helps their chances of sleeping at night - you can also implement a "dream feed" for babies under 6 months (waking and feeding them earlier on in the night) to help them get through a longer chunk of sleep.

For babies established on solids, giving them protein at their LUNCH solids will 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 some babies will still need to have milk in the night until well established on solids, and this might not happen until around 8 months old - this is completely normal.


Believe it or not, 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 hormone cortisol, which works like adrenaline in your baby’s body, inhibiting 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.


If your baby is younger than 4 months, 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. 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! Swaddling is proven to help your baby sleep for longer and means they can’t wake themselves up with their startle reflex.


Babies are really sensitive to temperature, being 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 and bamboo. These fabrics will 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.


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. For sleep, the white noise should be about as loud as a shower. This will also block out any external sounds that risk waking your baby up such as noisy siblings or the neighbour’s dog and also mean your baby hears the same thing they heard when they went to sleep, helping them transition between sleep cycles as they get older.


 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!


  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 naturally wake during the night.

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. See THIS article for more information on the 4 month sleep regression.  


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:

  • 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 Little Ones App that has helped over 200,000 families worldwide.



Zisapel, Nava. “New perspectives on the role of melatonin in human sleep, circadian rhythms and their regulation.” British journal of pharmacology vol. 175,16 (2018): 3190-3199. doi:10.1111/bph.14116

Perkin, Michael R et al. “Association of Early Introduction of Solids With Infant Sleep: A Secondary Analysis of a Randomized Clinical Trial.” JAMA pediatrics vol. 172,8 (2018): e180739. doi:10.1001/jamapediatrics.2018.0739

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

van Sleuwen BE, "Swaddling: a systematic review."; Pediatrics. 2007 Oct;120(4):e1097-106.

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

Paul IM, Savage JS, Anzman-Frasca S, Marini ME, Mindell JA, Birch LL. INSIGHT Responsive Parenting Intervention and Infant Sleep. Pediatrics. 2016 Jul;138(1). pii: e20160762. doi:10.1542/peds.2016-0762. PubMed PMID: 27354460; PubMed Central PMCID: PMC4925087.

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.


Your Baby's Sleep Journey

Download our guide to what to expect in the first few years of your child's life.

Get your free sleep chart


Related Blog Posts