If you’ve ever typed “why won’t my baby sleep?” into Google at 3am, you are very much not alone.
Sleep is one of the most common concerns we hear about in Baby College classes. It can feel relentless, emotional and sometimes isolating. Yet when we look at the science of infant sleep, much of what feels like a “problem” is actually completely typical development.
At Baby College, we believe confident parents make better parenting decisions. Understanding how babies sleep – and why – can help remove some of the pressure and guilt that often surrounds this topic.
Why Do Babies Wake So Often?
One key reason is biology.
A newborn’s stomach is tiny – roughly the size of their clenched fist. This means they need feeding little and often. Whether breastfed or formula fed, many young babies wake every 2–3 hours simply because they are hungry .
But hunger is only part of the story.
Sleep Cycles Are Shorter
Adults sleep in cycles of around 90 minutes. Babies’ sleep cycles are much shorter – closer to 60 minutes.
Even more interestingly, babies fall into REM (active) sleep first, rather than deep sleep. REM sleep is when:
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The brain is busy building connections
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Learning is consolidated
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Memory is strengthened
In fact, research shows babies who sleep within an hour of learning something new are more likely to retain it.
So that bedtime story? It genuinely matters.
Because babies spend more time in REM sleep – especially in the early months – they are much easier to wake. What feels like “poor sleep” is often a sign of a very busy, developing brain.
Developmental Reasons for Night Waking
Sleep changes as babies grow. Common phases include:
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Separation anxiety (often around 7 months)
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Learning new motor skills (waking to practise rolling, crawling or pulling up!)
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Teething discomfort
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Growth spurts
Understanding developmental stages – something we explore in our baby development classes near you – can help you respond calmly and appropriately, rather than feeling something has “gone wrong”.
Realistic Expectations Matter
Even babies who appear to “sleep through” will naturally stir between sleep cycles. Some simply resettle quietly.
Sleep is not linear. It is developmental.
And most importantly: needing comfort at night is not a bad habit. It is communication.
Supporting Healthy Sleep (Without Magic Solutions)
There is no one-size-fits-all method. What works for one baby may not work for another.
However, research-informed guidance suggests:
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A predictable, calming bedtime routine
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Consistent timing
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Avoiding screens in the hour before bed (blue light disrupts sleep)
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Keeping night interactions calm and low-stimulation
Small, steady adjustments are more effective than drastic changes.
You Are Not Failing
Modern parenting can feel overwhelming. Social media often amplifies unrealistic expectations. But biology has not changed – babies have always woken in the night.
At Baby College, our research-led programme supports parents to understand development, rather than fight it. Our classes provide:
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Evidence-based insights
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A safe, non-judgemental space
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Practical activities to support sleep, bonding and brain development
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A local community of parents who truly understand
If you’ve been searching for “baby classes near me” or “parent and baby groups near me”, you are very welcome to come and join us.
Because parenting was never meant to be done alone.
