12 Month Sleep Regression: What to Expect and How to Settle It
Your baby just turned one. The cake survived, the photos are gorgeous — and now they're standing up in the cot at midnight calling your name for the third time. The 12 month sleep regression is real, but it is usually the gentlest one of the first year.
This guide explains why it happens, how long to expect it, and the calm cues — including a recorded parent voice — that help separation-anxious Australian toddlers settle without escalating.
Why a 1-year-old's sleep wobbles
Three things converge at twelve months: a language explosion (your toddler suddenly understands far more than they can say), early walking attempts, and a peak in separation anxiety. The cot stops being a peaceful place and becomes a stage to perform new skills — or to grieve your absence.
Most regressions last 1–3 weeks. The trick is to make bedtime feel deeply familiar so the new developmental noise has a quiet backdrop.
Common signs
- Sudden bedtime protest from a previously easy settler.
- Multiple night wakes calling out (rather than crying).
- Standing or walking the cot at 1–3am.
- Refusing the second nap one day, demanding it the next.
- Stronger preference for one parent at bedtime.
A simple 7-step bedtime that absorbs the regression
- Warm bath at 6:00pm.
- Pyjamas and sleeping bag in dim light.
- Milk feed, sitting upright.
- Two short board books, same two every night.
- A personalised lullaby — ideally one that opens with a short greeting in your voice.
- Cuddle for 60 seconds, then into the cot drowsy.
- Lullaby loops for 30–45 minutes; you slip out.
Sample: Olivia's lullaby
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A 10-second recording of you saying 'goodnight, I love you' at the start of a personalised lullaby gives a separation-anxious toddler the gentlest cue that you are close.
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What to skip
- Don't drop the second nap mid-regression. Read our 2-to-1 nap transition guide for proper timing.
- Don't introduce a screen at bedtime to settle quicker — it costs you a fortnight later.
- Don't start co-sleeping unless your sleep surface meets Red Nose safe-sleep advice.
When to ask for help
If broken sleep persists past four weeks, contact your GP, child health nurse, Tresillian or Karitane. For the broader picture of toddler sleep, see our bedtime routine guide — much of it scales beautifully to one-year-olds.
Frequently Asked Questions
Is there really a 12 month sleep regression?
Yes — roughly half of Australian toddlers go through a 1–3 week sleep wobble around their first birthday, driven by walking, language explosion and separation anxiety. It is usually shorter and gentler than the 4 or 8 month regressions.
Does the 12 month regression mean dropping to one nap?
Not necessarily. Most babies hold two naps until 14–18 months. Dropping a nap during the regression often makes night sleep worse — wait until the regression passes.
How can a parent voice greeting help?
A short recording of your voice played at the start of a lullaby helps a separation-anxious toddler feel you are still close. It is one of the gentlest cues for this age.
Could it be teething instead?
Often both. Twelve-month molars push through around this time. Manage pain with paracetamol per Royal Children's Hospital advice, then hold your sleep routine steady.
When should I worry?
If sleep stays disrupted past 4 weeks, your toddler is losing weight, or you notice repeated night fears, talk to your GP or child health nurse.
Sample: Liam's lullaby
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