Baby Sleep Regressions

Signs of Sleep Regression in Babies and What to Do About It

In this baby sleep regression guide:

  • What is baby sleep regression?

  • Signs of sleep regression

  • Baby sleep regression ages

  • How regressions affect sleep associations and sleep cycles

  • How long do sleep regressions last?

  • Is it a sleep regression or something else?

  • Tips for surviving your baby's sleep regression

Imagine this: your child used to nap well and sleep through the night. Just when you think you have solved all their sleep problems, they start waking up at night and stop napping. How did this happen!?

People refer to this as a sleep regression, and if you’ve found yourself struggling with the issue, you’re not alone. Research in the Journal of Pediatric Psychology found that at least one in three mothers have issues with their baby's sleep. These sleep problems can seriously affect their daytime mental functioning and overall mental health.

A sleep regression is when a baby or toddler who usually sleeps well suddenly wakes up at night or skips naps. They can now be hard to settle for naps and at bedtime. Sucks, right?

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So, what is a sleep regression?

Basically, a sleep regression is any time where your baby seems to regress in their sleep or settling. For example, a baby who used to nap well may suddenly resist naps. A baby who sleeps through the night with 1-2 feeds may start waking every 2 hours. Researchers often link these regressions in sleep and settling to developmental changes.

Even though it may feel overwhelming, sleep regressions show that your baby is developing well. The bad news is that their sleep suffers. The good news is your baby is growing and learning. They are becoming more engaged with their surroundings, and that is worth celebrating!

How is a sleep regression different to a ‘phase’?

People often see sleep regressions as a ‘phase.’ However, they are a normal part of your child's development. In some cases, they can even become permanent and people cannot avoid them.

A phase suggests something that will pass on its own, which is true for most regressions except for the famous four-month sleep regression. This change in your child's sleep is not just a phase. A permanent shift has occurred. Keep reading to learn more.

Many things can make your little one go through a ‘phase’. Daylight saving can cause early morning wakes. Learning new skills like rolling or crawling can also be a reason. Being unwell may lead to this phase too.

In some cases, the changes to your baby’s settling or sleep may simply be because their naps needing a bit of tweaking. For example, if something is bothering their sleep, like sunlight, your baby may have trouble sleeping. If your little one is sick, that can also change their sleeping pattern for a while.

Before you think your baby is having a regression, check if their sleep problems have an easy fix. It could be their naps or sleep environment that needs some changes. Our Little Ones App can help with this!

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What are the signs of a sleep regression?

The main sign that your little one is going through a regression is that their sleeping pattern takes a turn for the worse. For example, your baby may have been a great napper before reaching 3-4 months. Suddenly, you find yourself in an anti-nap battle. Or your 8-10 month old might have been happily sleeping through the night and is now having 3 am parties every night!

Some common signs to look out for are:

  • Your baby’s daytime naps may become shorter.

  • They may start waking more overnight.

  • They can become overtired as a result of poor naps and waking more overnight.

  • Your baby might resist naps/bedtime and need more help settling to sleep.

  • Your baby may no longer easily go back to sleep when they wake.

  • General fussiness/irritability with no apparent cause.

  • They’re not hungry or sick.

baby sleep regressions

Baby Sleep Regression Ages

There are five distinct sleep regression ages that most babies and toddlers will experience:

  1. As early as 8 weeks - it’s a minor blip, but it happens.

  2. Around 4 months.

  3. Between 8-10 months.

  4. Between 12 -15 months.

  5. Around 2 years.

The 8-week baby sleep regression

This is the magic mark where many babies begin to catnap and start sleeping worse in the day. Their newborn sleepiness has worn off so your baby suddenly seems a lot more alert now.

At this point, their mother's melatonin has worn off. They need to make their own melatonin to fall asleep easily and sleep well.

Melatonin is a sleep hormone made in the dark. A very dark room helps babies connect sleep cycles. This helps them stay asleep during naps and at night.

It also helps their circadian rhythm. If your baby still takes short naps, even with blackout blinds, their nap times may need some changes. This can help them move away from newborn sleep patterns. Read more about how to cope with a catnapping baby.

The 4-month sleep regression

The first of the significant sleep regressions is the most substantial change in your baby’s sleep cycle EVER! In fact, as we mentioned earlier, it’s a permanent change. Your little one will now wake up fully between each sleep cycle. They used to drift between cycles when they were younger.

If your baby relies on a parent-led sleep method, they will want that help when they wake up. This includes methods like feeding, rocking, or patting.

The key to getting through this regression is to help your baby learn to settle themselves. Sleep is now something your baby is aware of. They will need practice to learn how to settle and re-settle themselves. Unfortunately, this regression WON’T go away until your baby has learnt to self-settle.

Read more about the 4 Month Sleep Regression.

The 8 -10 month sleep regression

At this age, your baby is going through a massive physiological developmental change. Your baby is a busy bee.

They will learn to crawl, pull up to stand, and find their voice. This means they may wake during naps or at night to practice their new skills. Basically, at this age, babies find their own amazingness distracting (and rightly so).

At this age, many babies feel more separation anxiety. This can make your baby clingy and hard to settle for naps and bedtime. When this happens, it’s incredibly easy for new sleep habits to form so your best bet is to try to stay consistent! Don’t worry, unlike the 4-month regression, this one should only last for a couple of weeks on and off.

Read more about the 8-10 Month Sleep Regression.

The 12 - 15 month sleep regression

This sleep regression is less common and is more to do with the nap transition around this age. Around 12 months, your baby may stop taking 2 naps. Many parents think this means it’s time to switch to 1 nap. This could be the case for some babies, but for others, it can be closer to the 15-month mark.

If your baby is alert or sleeps well past 7 am, they might drop to one nap after 12 months. However, if your baby wakes up earlier, this change will happen closer to 15 months. Don’t rush this transition!

As your little one gets used to this change, they might wake up earlier in the morning. They may also wake up after one sleep cycle at bedtime for a few days. However, like the 8-10 month regression, this will usually fix itself once your baby gets through the nap transition.

Read more about the 12-15 Month Sleep Regression.

The 2-year sleep regression

Just when you thought it was over … you thought wrong! At this age, your baby is now a toddler, and independence comes with that. They’re going through some major developmental milestones that can negatively impact their sleep, and there is often a peak in separation anxiety.

This regression can cause toddlers to resist their day sleep - sometimes refusing their nap altogether. Many parents think this means their toddler is ready to stop napping. However, this is rarely true. Most 2-year-olds will become overtired without a nap.

Again, this regression will pass, but you have to remain strong with your sleep schedule, especially now your toddler has found their voice and can argue like there’s no tomorrow! As long as you stay consistent with offering the nap each day, your toddler will more than likely go back to napping well once this regression has passed.

Read more about the 2 Year Sleep Regression.

How does a sleep regression affect sleep cycles?

Your baby’s sleep cycles change significantly during the 4-month sleep regression. Prior to 3 or 4 months, babies' night-time sleep cycles are 4-6 hours long, but after this time, babies go through a massive development, where their sleep cycles become more organised and pronounced.

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Changes to sleep cycles around the four-month mark:

  • Day time cycles change - This is where babies begin to wake fully between each 45 minute sleep cycle in the day.

  • Night time sleep cycles shorten to be 2 hours long and babies stop drifting from one cycle to another so easily.

Baby Sleep Cycle Chart

Since your little ones' sleep cycles have changed, they may start taking more catnaps. This can make them very overtired by bedtime. Catnaps are the least restorative type of nap for a baby.

This change also marks the point in which learning to self-settle can really benefit your baby’s napping and night-time sleep. You can learn more about self-settling here.

How does a sleep regression affect sleep associations?

New sleep habits often form during times of big changes or when transitioning naps. This can happen around 8 weeks, at 3-4 months, during the 8-10 month regression, or during the 12-15 month nap transition.

Babies can be more difficult to get to sleep during these times because they might be over or under tired, they are standing or sitting in their crib or their sleep needs have changed. A baby in any of these situations won't be able to settle to sleep easily.

During sleep regressions, you may rock or feed your baby to help them sleep. If your baby relies on this method, they will need you to do it every time they wake up between sleep cycles.

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How long do sleep regressions last?

Not all sleep regressions last the same amount of time. It depends on your child's age and their developmental milestones.

Now, we hate to break it to you but the infamous four-month sleep regression is a whole different ball game. As mentioned earlier, this is the biggest change in your baby’s sleep that will ever happen and it is a permanent change too. This regression won’t go away until they have learnt to self-settle.

Unlike the four-month sleep regression, other sleep regressions will pass. They should only last a few weeks on and off, as long as no new sleep habits develop during this time.

What causes sleep regressions?

Nothing really CAUSES regressions. They are just phases that all babies experience. However, sleep regressions can be confused with other things. These include growth spurts or the need for nap changes.

These can change your child's sleeping pattern. However, they are not a true "regression." Sleep regressions relate more to your baby's mental growth than their physical growth.

Is it a sleep regression or something else?

If your little one has suddenly started showing signs of a sleep regression, it’s a good idea to rule out other potential causes first.

Growth Spurts

When babies suddenly start to wake more during naps or overnight, it can sometimes be due to a growth spurt - particularly if they are wanting to feed as soon as they wake. Growth spurts happen more frequently than sleep regressions and usually don’t last for more than a week.

If your baby seems to be going through a “growth spurt” around 4 months though, keep in mind that their waking may actually be due to the sleep regression. For some babies, particularly those who are fed to sleep at the start of naps and bedtime, they can start to wake in between sleep cycles expecting to be fed back to sleep each time.

Teething

Teething usually gets the blame for A LOT of issues surrounding your wee one. My baby’s not feeding … oh it must be teething, my baby is grumpy...must be teething, my baby isn’t sleeping ...must be teething. But the truth is teething is actually a short-lived nightmare that happens for a day or two and you will know when your little one is teething as you can actually see the tooth emerge from the gum.

So, if your little one is waking more than usual and they are around 3-4 months and you can’t see any teeth sprouting, then it’s safe to say they have hit the 4 month sleep regression. Read more about teething.

Separation Anxiety

As your baby gets older, you may recognise that they start to cling to you more or cry when they are left with someone other than you, this is called separation anxiety. This is quite common from around 6 months onwards when babies start to develop the concept of object permanence.

Object Permanence is the understanding that objects continue to exist even when they cannot be perceived (seen, heard, touched, smelled or sensed in any way). In the early months of your baby’s life, you may have seen them enjoy peek-a-boo. They think that when you disappear from view, you are gone. Then, when you reappear, it feels like magic. However, older babies no longer see it this way.

This can cause your baby to become clingy and hard to settle at naps or bedtime, or they may need you to stay in the room with them while they fall asleep. This is particularly common during the 8-10 month sleep regression.

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How do sleep regressions coincide with changes to napping/sleeping?

Some sleep regressions occur around the same time as nap transitions, which usually happen around 6-8 months and 12-15 months. During this time, you may find that your baby is clingier in the day and harder to settle at bedtime.

  • The 3-2 nap transition happens around 6-8 months old

  • The 2-1 nap transition happens around 12-15 months old

Do sleep regressions ‘ruin’ the sleep training you have done/doing/plan to do?

The answer is not at all. Sure, a regression can make it harder to stick to a plan. However, working on self-settling is the best way to get through the big 4-month sleep regression. We believe that being prepared is very important.

Sticking to a schedule and developing good sleep habits early will help you later. You will notice when a sleep regression happens because you can see changes in your baby’s sleep patterns. And most importantly, you will recognise when your baby’s sleep needs have changed due to illness, in which case you can contact your GP straight away.

Our Little Ones App can help you to regulate your baby’s sleeping patterns. We’re not saying it will be easy. Dealing with a regression is really tough. However, following a routine can help your little one adjust to these big changes. This will make it easier for them to get through the regression.

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How to survive your baby's sleep regression

We know it probably feels like the first 12-18 months of your little one’s life is an endless whirlwind of regressions, but just remember they are natural developmental periods in your baby’s life that are helping them to grow, mature and develop. And yes, it’s going to be tough, but there are plenty of things that you can do to help you and your little one along the way.

Firstly, breathe and realise it won’t last forever.

Apart from the four-month sleep regression, the other regressions are not permanent and can go away in a matter of weeks.

Give your baby the chance to self-settle.

Now, this doesn’t mean hard-out sleep training or a crying, abandoned baby. Instead, self-settling simply means your baby is able to fall asleep on their own when they’re ready to (this shift happens during the four-month sleep regression). Try putting your baby down to sleep in their crib when they’re drowsy, but still awake, this will help your wee one to self-settle and will also break those existing sleep associations.

Encourage good sleep habits early on before the regressions hit.

This way you won’t have to try and change any deeply ingrained sleep associations down the track.

Good sleep habits to foster:

  • Make sure the awake times are age-appropriate

  • Sleeping your baby in a totally dark room to allow the release of the sleep hormone melatonin

  • Have a good bedtime routine to follow (check out our article here), which highlights the importance of a bedtime routine)

  • Using white noise to help get your baby to sleep

  • Ditch the dummy/pacifier if you’re having to replace it all night long

  • Allowing your baby to sleep in their crib for their day time naps as they will learn to associate their bed with sleep.

Stick to your routine.

Although sleep regressions make it difficult for you to stick to your schedule, try to keep up with your regular routine as it will make it so much easier to get back to it once the regression is over.

Don’t suffer in silence.

You also have to look after yourself during this time and if that means asking for help from a grandparent, your partner or a friend, then do it. The more help you can get the better. You are welcome to join our community on social media, or in our in our baby sleep app, where you can talk to other parents and our certified sleep consultants for tips to get you through these tricky periods.

Baby sleep is an ever-changing phenomenon. From infancy to toddlerhood, many things can affect your baby's sleep patterns. Some of these changes are temporary, like a cooler night. Others last longer, like developmental leaps during a regression.

Almost everything in your baby's world will have some impact on their sleep, so in a sense, babies regress and progress in their sleep all the time and sleep regressions are simply just part of that process. So, with that in mind, just remember - you’ve got this!

If you do need a helping hand with tackling your baby’s sleep during this tricky time then have a look around our website and check out our comprehensive Little Ones App.

Say goodbye to sleepless nights.
Join over 800,000 families worldwide who are enjoying excellent sleep with our Sleep App, created by experts in the field of pediatric sleep.
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Bibliography

Atun-Einy, O., & Scher, A. (2016). Sleep disruption and motor development: Does pulling-to-stand impacts sleep–wake regulation? Infant Behavior and Development, 42, 36–44. https://doi.org/10.1016/j.infbeh.2015.11.003

Coons S; Guilleminault C. (1982). Development of sleep-wake patterns and non-rapid eye movement sleep stages during the first six months of life in normal infants. Pediatrics, 69(6). https://pubmed.ncbi.nlm.nih.gov/7079046/

Coons, S., & Guilleminault, C. (1984). DEVELOPMENT OF CONSOLIDATED SLEEP AND WAKEFUL PERIODS IN RELATION TO THE DAV/NIGHT CYCLE IN INFANCY. Developmental Medicine & Child Neurology, 26(2), 169–176. https://doi.org/10.1111/j.1469-8749.1984.tb04428.x

St James-Roberts, I., Roberts, M., Hovish, K., & Owen, C. (2015). Video Evidence That London Infants Can Resettle Themselves Back to Sleep After Waking in the Night, as well as Sleep for Long Periods, by 3 Months of Age. Journal of Developmental & Behavioral Pediatrics, 36(5), 324–329. https://doi.org/10.1097/dbp.0000000000000166

Tham, E., Schneider, N., & Broekman, B. (2017). Infant sleep and its relation with cognition and growth: a narrative review. Nature and Science of Sleep, Volume 9, 135–149. https://doi.org/10.2147/nss.s125992

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