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As much as we hate to say it, there are going to be times when your baby or toddler’s sleep and settling may be disrupted. Illness, teething and hitting exciting developmental milestones can all cause a disruption to sleep. But don’t worry, if you’ve been working on laying the 4 foundations to healthy sleep, these disruptions should only be temporary and your precious sleep patterns and routines don’t have to come completely unstuck.

What is a sleep regression? A sleep regression is when you see a shift in your baby or toddler's sleep patterns without an obvious cause like illness, teething or travelling.  Your baby, who may have been sleeping beautifully during the day and night, suddenly starts waking often during naps and overnight, and is difficult to settle back to sleep.  You may experience these periods around 4months, 8months, 12months and even 18months and while no one wants any setbacks in sleep, the exciting news is that it’s happening because your little one is experiencing a developmental leap. That’s why some people like to call them ‘Sleep Progressions’.

If your baby does experience a sudden change in sleep and behaviour it’s important to always rule out illness first. Don’t just assume they’re experiencing a sleep regression. Viruses, ear infections, even UTIs can all impact on how bub is feeling and sleeping so don’t ever hesitate to take your baby to the doctor. If they’re given a clean bill of health you’ll know there’s no underlying pain or discomfort requiring medical intervention, causing the sleep and settling issues.

The “4 Month Sleep Regression / Progression”:  The first time you hear people talk about a sleep regression is usually when a baby is about 4 months. Just as each bub is individual, these changes may happen a little earlier or later than 4 months and each baby’s experience will be different.

By 3-4 months of age, a baby is much more alert and aware of their surroundings than when they’re a newborn and there’s a lot going on in their development. They may be reaching out to grab things, have better head control, start making new sounds and for many, this is the time you’ll see them learning to roll.

Just like everyone around them, bub is super excited about all the new things they’re able to do. So when they’re moving into the lighter phases of their sleep, and transitioning from one cycle to the next, they’re more likely to wake, notice and be interested in their surroundings and want to practice their new skills. That self-soothing back to sleep they were starting to learn is no longer their priority!

Once bub has started mastering their new skill and it’s no longer so new & exciting, their sleep should get back on track, but there are ways you can help manage and survive the disrupted periods (see more below).

Other periods of sleep and settling disruption: Bub may experience disruptions to their sleep again when they’re learning new motor skills like crawling, sitting, standing and walking, when they’re starting to talk and express themselves in new and different ways, when they’re getting older and start testing the boundaries, trying to prove their independence and of course, when they’re teething, unwell and when you’re travelling or leaving them in a new or different environment (like daycare or sleepovers at the grandparents).

All babies and children will go through these stages and phases in some way. While you can’t avoid or control them, try to remember, these periods of change and disruption are temporary.

Here are some tips to help you survive and manage these periods of disrupted sleep:

      1. Try to stay calm. Remember this is temporary and a natural development.  It shows your baby’s development is progressing and while it might take a couple of weeks, bub’s sleep will get back on track. If bub’s sleep is disrupted because of illness, teething or travel, just remember what your sleep is like when you’re unwell or jet-lagged – disrupted, right?!
      2. Stay consistent. You might need to offer a little extra support as bub settles off to sleep or if they wake overnight and it might take a little longer than usual to get them to settle. If they’re unwell or in a new environment, they may need more reassurance and comfort. It’s okay to be flexible, just try to stay consistent with your routines and the strategies you use as best you can.
      3. Remember the 4 foundations to healthy sleep. When we’re exhausted and desperate for our little ones to sleep it’s easy to try anything you can to get them drifting back to dreamland as quickly as possible. Remembering the tips and tricks, settling methods and ways to support bubs self-soothing covered in the Sleep Series will help you and bub get through these periods of disruption and avoid you from forming any bad habits.
      4. Make sure bub is getting enough sleep. Whether bub is unwell, teething, in a new environment or going through a period of development, it's important they still get enough sleep across their whole day. If bub had a particularly disrupted night, they may need to make up for it with extra or longer naps the next day. Remember, an overtired baby can be even harder to settle so keeping them well rested is key.


Having a baby isn't easy and it's common to feel overwhelmed, vulnerable and in need of help and support.

You don't need to feel like you're in this alone. Whether it's more support with your baby's sleep, assistance with feeding or some extra help for you or your partner, we encourage you to reach out to family, your doctor or one of the many support organisations and services for new and expecting parents and carers.

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