The Complete Guide to Baby Sleep (0–2 Years)

You're not here by accident. You're probably reading this at a time when sleep feels like the most elusive thing in the world — when you're running on fumes, second-guessing every decision, and wondering why nobody warned you it would be this hard.

I hear this every single week from the families I work with across Australia. And the first thing I always say is: this is not your fault, and it is fixable. Every single one of them.

I'm Chantal, and over the past 11 years I've had the privilege of supporting more than 4,000 families through some of the toughest nights of their lives. What I've seen again and again is that most parents aren't doing anything wrong — they just haven't been given the right information for their baby's age and stage.

This guide is designed to change that. Whether you have a newborn who's still figuring out night from day, a 6-month-old who's catnapping through the day, or a toddler staging a full-scale bedtime revolt — you'll find practical, evidence-informed guidance here that is gentle, realistic, and actually works.

What you'll learn in this guide:

• How sleep works at every stage from 0–2 years
• Why sleep issues happen — and the simple science behind them
• The most common mistakes parents make (and how to avoid them)
• Practical routines and frameworks you can start tonight
• When to expect sleep to improve, and when to ask for help

Understanding Baby Sleep: The Basics

Before we talk about routines and strategies, it helps to understand what's actually going on biologically. Baby sleep is genuinely different from adult sleep — and knowing why makes everything else make more sense.

Baby Sleep Cycles Are Shorter

Adult sleep cycles run for roughly 90 minutes. A baby's sleep cycle is closer to 40–50 minutes. This means babies naturally come to a partial arousal more frequently — and if they haven't yet learned to resettle themselves, they'll call out for the same conditions they fell asleep with.

This is the science behind why your baby wakes the moment you put them down, or why they're up every 40 minutes overnight. It's not random — it's biology. And it's something we can absolutely work with.

The Role of Wake Windows

One of the most powerful tools in the sleep toolkit is understanding wake windows — the ideal amount of awake time between sleeps. When a baby is put down too early, they're not tired enough to settle. Too late, and they become overtired, which makes it even harder to fall and stay asleep.

I go into detail on this in my post on wake windows by age, but here's a general guide:

*These are general guidelines. Every baby is different — always watch your baby's sleepy cues alongside the clock.

Sleepy Cues: Your Baby's Sleep Language

Before your baby can tell you they're tired, their body does it for them. Learning to read sleepy cues is one of the most valuable skills you'll develop as a parent. Early cues include slowing down, losing interest in activity, and staring off into the distance. Once you start seeing eye rubbing, yawning, and fussing — you're already in the overtired window. Act on those earlier signals where you can.

What's Normal at Each Stage (0–2 Years)

One of the most common things I hear from exhausted parents is: "Is this normal?" So let's be really clear about what typical sleep looks like across the first two years.

Newborns (0–3 months)

Newborn sleep is beautifully chaotic. Newborns sleep in short bursts, wake frequently to feed, and have little distinction between day and night for the first few weeks. This is completely normal. Your goal at this stage is not a rigid schedule — it's about learning your baby's cues, establishing day/night differentiation, and keeping feeds regular during the day.

For an in-depth look at this stage, read my full guide to newborn sleep.

3–6 Months: The Foundation Stage

This is when biological sleep patterns start to mature. Babies begin producing melatonin more consistently, night sleep starts to consolidate, and a more predictable rhythm becomes possible. This is also when the infamous 4-month sleep regression can hit — which is actually a sign of neurological development, not a step backwards.

Building a consistent bedtime routine during this window is one of the highest-leverage things you can do.

6–12 Months: Consolidation and Catnapping

Many parents find this stage the most challenging. Catnapping, frequent night wakings, and the 8–10 month regression can make it feel relentless. But this is also when self-settling skills become genuinely achievable — and when getting sleep foundations right has the biggest long-term payoff.

Nap transitions during this period matter a lot. Babies typically move from 3 naps to 2 naps around 6–8 months. Understanding nap transitions helps avoid the overtired spiral that causes so many night wakings.

12–24 Months: The Toddler Transition

Toddlers are in a constant developmental sprint — language, mobility, independence, and big emotions all arriving at once. Sleep regressions (the 12-month, 18-month, and 2-year regressions are all real) can disrupt a previously settled child, but they're temporary when managed well.

The 2-to-1 nap transition typically happens between 15–18 months, and how you navigate it has a significant knock-on effect for night sleep. Most toddlers still need that single nap well into their second year, and dropping it too early is one of the most common mistakes I see.

The 5 Most Common Sleep Mistakes (And How to Fix Them)

In over a decade of consulting, I've seen the same patterns come up again and again. Here are the five mistakes that most commonly derail baby sleep — and exactly what to do instead.

1. Keeping Baby Awake to Make Them 'More Tired'

It feels logical, but it backfires. Overtired babies produce cortisol (the stress hormone), which actually makes it harder to fall asleep and stay asleep. If your baby is fighting sleep, the answer is almost always less wake time, not more.

2. Inconsistent Sleep Conditions

If your baby falls asleep feeding, rocking, or in arms — and then wakes in a cot — their brain registers a mismatch. They'll wake looking for the condition they fell asleep with. Teaching self-settling means creating a consistent start-to-sleep experience so they can do the same thing at 2am that they did at 7pm.

3. A Sleep Environment That's Working Against You

Light is the single biggest enemy of baby sleep. Even dim light can suppress melatonin production. A properly dark room — where you genuinely cannot see your hand in front of your face — makes a measurable difference. Pair this with white noise and you've created conditions that support deep, consolidated sleep.

4. Skipping the Bedtime Routine

A predictable bedtime routine signals to a baby's nervous system that sleep is coming. It doesn't need to be elaborate — 20–30 minutes of consistent cues (bath, feed, book, song, bed) is all it takes. The consistency is everything.

5. Abandoning the Plan Too Soon

Any change to sleep will involve some protest — that's normal. Most parents give up in the first two nights, right before things start to improve. I always tell families: give any new approach at least three to five consistent nights before you assess whether it's working.

Building a Sleep Foundation: The BSM Framework

Across all the families I've supported, the ones who see the most consistent improvements share a few common foundations. I call this the BSM Sleep Framework, and it works for babies from around 3 months through to toddlerhood.

The BSM Sleep Framework:

• Environment first — dark room, white noise, safe sleep surface
• Age-appropriate wake windows — not too early, not too late
• Consistent bedtime routine — same cues, same order, every night
• A drowsy-but-awake start — giving your baby the chance to settle
• Responsive but consistent — meeting needs without creating new dependencies
• Patience with the process — sustainable change takes 5–7 nights

Sample Bedtime Routine (6–12 Months)

What About Night Wakings?

Night wakings are one of the most common reasons parents contact me. The key question is always: why is the baby waking? The answer is different at different ages.

• Under 3 months: Waking to feed is completely expected and appropriate.
• 3–6 months: Night feeds may still be nutritional — but more may be habitual.
• 6–9 months: For healthy, well-grown babies, most night wakings are often about settling skills rather than hunger.
• 9 months+: Most night wakings can often be addressed through improving self-settling ability.

Understanding how to resettle and link sleep cycles is the game-changer for overnight sleep — and it's one of the most practical skills I teach families in consultations.

What to Do Tonight: A Quick-Start Checklist

Sometimes the most helpful thing is knowing where to start tonight — not in two weeks when you've read everything. Here's a simple audit of the highest-impact changes you can make right now:

• Is the room dark enough? (You should not be able to see your hand in front of your face)
• Is white noise on — continuous, not a timer?
• Is your baby's wake window appropriate for their age?
• Do you have a consistent 20–30 min bedtime routine?
• Are you giving your baby a chance to settle before going in?
• Is your baby starting sleep in the same place they'll wake up?
• Are you responding consistently — same approach every time?

Sleep Regressions: What They Are and How to Survive Them

A sleep regression is when a baby who was sleeping reasonably well suddenly isn't. They're triggered by developmental leaps — new skills, mobility milestones, or cognitive growth that temporarily disrupts sleep architecture.

The most common regressions are the 4-month, 8–10 month, 12-month, 18-month, and 2-year regressions. Each has its own characteristics, but the approach is consistent: maintain your routine, give extra comfort without creating new sleep dependencies, and trust that it will pass.

For a full breakdown of every regression and how to navigate each one, read my comprehensive guide to sleep regressions.

When to Get Professional Help

Some sleep challenges are genuinely self-resolving with the right approach. Others are complex enough that having a professional in your corner makes a significant difference.

Consider booking a consultation if:

• Your baby is waking more than 3–4 times per night past 6 months
• You've tried consistent approaches and nothing is improving
• Sleep deprivation is affecting your mental health or relationship
• Your baby has a health condition (reflux, tongue tie, etc.) complicating sleep
• You're approaching a major transition (nap drop, moving rooms, new sibling)

I offer in-home consultations across the Gold Coast to South Brisbane, and online consultations for families across Australia. Every consultation is tailored to your baby's age, temperament, and your family's values — with a gentle, responsive approach at the core.

Frequently Asked Questions

When should my baby be sleeping through the night?

There's no universal milestone for this, and 'sleeping through' means different things at different ages. Many babies are capable of longer stretches from around 4–6 months, but this depends heavily on development, weight, feeding, and sleep foundations. I explore this fully in my post on when babies sleep through the night.

My baby only naps for 30–40 minutes. Is that normal?

Absolutely. This is known as catnapping and is extremely common — particularly in babies under 6 months. It happens because babies complete one sleep cycle and partially rouse. Linking sleep cycles is a skill that can be gently encouraged with practice and the right conditions.

Is it too late to fix sleep if my baby is already 12 months old?

Absolutely not — in fact, many parents find that babies from 6 months onwards respond really well to gentle sleep shaping. I've worked with toddlers up to age 3 with great outcomes. It's never too late to start.

Do I need to do sleep training to fix sleep?

No. My approach is responsive and gentle — I don't advocate for cry-it-out methods. The foundations of great sleep (environment, wake windows, routine, self-settling) can all be established without leaving your baby to cry it out. Some fussing is often part of any change, but there's a significant difference between that and unsupported crying.

What's the difference between a sleep regression and a bad week?

A sleep regression is typically tied to a developmental milestone and involves a sudden change in a previously settled baby. It usually has some other observable signs — new skills emerging, increased fussiness, or changes in feeding. A 'bad week' is often linked to something environmental: illness, travel, teething, or a schedule disruption. The approach to both is broadly similar — maintain routine, offer comfort, and give it time.

My baby was sleeping well and now isn't — what happened?

This is one of the most common questions I receive. Sleep setbacks are normal and rarely permanent. Common triggers include illness, travel, developmental leaps, schedule changes, and transitions. The most important thing is not to introduce new sleep associations in response — try to maintain your existing routine with a little extra comfort. For strategies on recovering from disruption, see my post on getting back on track after a sleep disruption.

You're Closer Than You Think

I want to end this guide with the same thing I say to every family I work with: sleep is a skill, and skills can be learned.

Your baby is not broken. You are not failing. Sleep struggles are one of the most universal experiences in early parenthood — and they are also one of the most solvable.

Whether you implement one idea from this guide tonight or decide you'd like personalised support, know that better sleep is genuinely within reach. I've seen it hundreds of times. I know it's possible for your family too.