The Importance of Sleep for Your Baby

Hope For Tired Parents

Becoming a new parent is an incredible journey, but let’s be honest, it can also be utterly exhausting.

We’ve been there ourselves; bleary-eyed at 3am, pacing the hallway with a crying baby, wondering if we’d ever sleep again. If you’re in that fog right now, please know, you’re not alone.

Baby sleep in the early weeks and months can feel chaotic and overwhelming. But here’s the good news: so much of what you’re experiencing is biologically normal. Sleep in the first year is not broken, it’s developing.

And as your little one grows, so much is possible. This guide is here to gently walk you through what’s normal, what’s hopeful, and what you can do to support your baby (and yourself) along the way, without pressure or judgment.

Newborn Sleep (0–4 Months): Understanding Biological Norms

In the beginning, it may feel like your baby’s sleep is all over the place, and that’s because it is. But not in a worrying way. In fact, newborns are not yet wired to sleep like older children or adults. Here’s why that matters:

• No Day/Night Rhythm Yet: Newborns haven’t developed a circadian rhythm (internal clock) nor started producing melatonin (the hormone that helps us feel sleepy at night). This only begins around 3-4 months of age, which means your baby can’t distinguish night from day early on.
  
• Short, Active Sleep Cycles: Young babies have very short sleep cycles (around 45-60 minutes) and spend much of it in REM (active) sleep. It’s normal for them to wake frequently and need help getting back to sleep, whether through feeding, rocking, or holding.
  
• They Need You: Self-settling isn’t something babies can do from birth. Feeding or cuddling your newborn to sleep isn’t creating ‘bad habits’, it’s responding to their very real needs.
  
• There Is No Schedule (Yet): Sleep in the early months is irregular. Some days your baby may nap a lot, others hardly at all. That doesn’t mean you’re doing anything wrong - it’s just part of this tender, transitional phase known as the fourth trimester.

Gentle Tips for the Newborn Stage:

Embrace contact naps, safe co-sleeping, or feeding to sleep if that’s what helps.

Let go of comparison. Every baby is different, and there’s no gold star for ‘sleeping through’ early.

Rest when you can and ask for help when you need it. Your wellbeing matters too.

Average overnight sleep: 10–12 hours

Average nap length: 10 minutes to 3 hours

Total sleep in 24 hours: Around 16 hours

5–12 Months: Laying the Foundations for Better Sleep

By about 5-6 months, many babies begin showing signs of readiness for longer stretches of sleep and more predictable rhythms. This doesn’t mean sleep becomes perfect overnight, but it does mean there’s a biological shift that gently opens the door to more solid sleep.

What’s Changing at This Stage?

• Circadian Rhythms Are Maturing: By now, your baby is producing more melatonin in the evening and cortisol inthe morning, making it easier for their body to fall into a natural rhythm of sleep and wake.
• Sleep Becomes More Teachable: Your baby may now be capable of learning gentle self-settling skills (if that feels right for your family). A calming bedtime routine, consistency, and connection go a long way.
• Night Feeds Can Reduce: Many babies who are gaining weight well can begin to reduce night feeds after 6 months, though every baby is different. Some will continue to need one feed overnight for a while longer, and that’s okay too.
• Predictable Patterns Begin to Emerge: You may notice your baby settling into a rhythm of 2-3 naps and more consistent night sleep. There will still be regressions and teething and colds, but overall, things get more manageable.
  
  

Average overnight sleep: 11–12 hours

Naps: 2–3 per day, totaling 2–4 hours

Total sleep in 24 hours: 12–16 hours

1–2 Years: Navigating Nap Transitions & Nighttime Boundaries

The toddler years bring exciting growth and new challenges, including those around sleep. Sleep needs are still high (around 11–14 hours in total), but changes like nap transitions, separation anxiety, and boundary-testing can affect sleep.

What to Expect:

• 1 to 2 Nap Transition: Most toddlers drop from two naps to one between 12 and 18 months. This can be bumpy, but eventually they settle into a longer midday nap.
• Emotional Ups & Downs: As toddlers discover their independence, bedtime resistance or frequent waking may show up. A predictable, loving bedtime routine helps toddlers feel secure.
• Physical & Brain Growth: Growth hormone is released during deep sleep, so good rest helps with both physical and emotional development. Overtired toddlers may be more prone to tantrums, fussiness, or difficulty focusing.
  
  

Average overnight sleep: 11–12 hours

Nap: 1.5–3 hours

Total sleep in 24 hours: 12–14 hours

3–5 Years: Sleep in the Preschool Years

Preschoolers typically need 10–13 hours of sleep in total. Many children drop their nap between the ages of 3 and 4, though quiet time can still be helpful.

Common Themes:

• Bedtime Resistance: Preschoolers may stall bedtime as a way to assert control or due to fears. Stay calm, consistent, and connected.
• Nightmares/Night Terrors: These are common around this age. Offer comfort, reassurance, and a sense of safety at bedtime.
• Growing Independence: Kids this age benefit from being involved in bedtime routines—let them choose a story or pick pyjamas to give them a sense of control.
  
  

Average overnight sleep: 10–12 hours

Nap (if any): Up to 2 hours

Total sleep in 24 hours: 10–13 hours

Why Sleep Matters So Much - for Baby and You

Sleep is about so much more than just rest. In the first 12 months of a baby’s life, it’s a vital foundation for their growth, development, and wellbeing.

• Brain Development: Sleep fuels learning, memory, emotional processing and supports cognitive and language development.
• Physical Growth & Repair: Growth hormone is released during sleep. Good rest supports healthy weight gain, tissue repair, and immune function.
• Emotional Regulation: Well-rested babies tend to be more settled, responsive, and better able to engage with the world around them, which helps support emotional regulation and bonding.

Sleep in the first year of your baby’s life isn’t just essential for them, it’s absolutely vital for you, too. When you’re well-rested, you’re more emotionally balanced, patient, and better equipped to navigate the ups and downs of parenthood. Quality sleep supports your mental health, helping to reduce anxiety, ease feelings of overwhelm, and lower the risk of postnatal depression.

Sleep also plays a huge role in strengthening your connection with your partner and your baby. When you’re running on empty, it’s much harder to be present, to communicate well, or to enjoy those precious early moments. Better rest can also rekindle intimacy, bring more ease into your daily routines, and allow you to show up as the parent—and person—you want to be. You deserve sleep just as much as your baby does.

Closing Thoughts: You’re Doing Better Than You Think

We know how hard it is to function on little sleep. If you’re in the thick of it, please take heart that this phase doesn’t last forever. Sleep is a journey, and there’s no rush to ‘get it right’. It’s much more about getting it right for you.

Whether that means holding your newborn for every nap, helping your 10-month-old learn to settle, or supporting your toddler through night terrors, you’re doing beautifully.

Every child is different. Every path is valid. What matters most is that your child feels safe, loved, and supported, and that you feel confident, clear and calm too.

Better sleep is always possible. And you don’t have to figure it out alone. We’re here when you need us, cheering you on.

With love,

Eve & Gem

The Calm & Bright Sleep Sisters

Watch our new Resident Sleep Experts bust common baby sleep myths here.