Quick Answer: Babies sleep differently at every stage — a newborn needs 14-17 hours spread across the day and night, while a one-year-old consolidates to 11-14 hours with one or two naps. The biggest lever parents have is wake windows (the awake time between sleeps), which change every few months. Sleep training, when appropriate, works best after 4-6 months when the brain can begin consolidating night sleep.
In This Guide
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Wake Windows by Age
Wake windows are the maximum time a baby should stay awake between sleeps before becoming overtired. Overtired babies are harder to settle, wake more frequently at night, and take shorter naps — the opposite of what parents want. Getting wake windows right is the highest-leverage thing most parents can do before considering sleep training.
| Age | Wake Window | Total Sleep (24 hrs) | Number of Naps |
|---|---|---|---|
| 0-6 weeks | 45-60 minutes | 14-17 hours | 4-6 (no schedule) |
| 2-3 months | 60-90 minutes | 14-16 hours | 4-5 |
| 3-4 months | 75-120 minutes | 14-16 hours | 3-4 |
| 5-6 months | 2-2.5 hours | 13-15 hours | 3 |
| 7-9 months | 2.5-3.5 hours | 12-15 hours | 2 |
| 10-12 months | 3-4 hours | 11-14 hours | 2 |
| 13-18 months | 4-6 hours | 11-14 hours | 1-2 (transition to 1) |
| 18 months - 3 years | 5-7 hours | 11-14 hours | 1 |
For a more detailed breakdown with sample daily schedules, see our wake windows by age guide which covers every age from newborn through toddler with timing examples.
The wake window principle has one important caveat: these are averages. Individual babies vary by 20-30 minutes in either direction. Watch for tired cues (eye rubbing, zoning out, decreased activity, yawning) rather than watching the clock exclusively. The clock is a starting point; the baby tells you where the actual limit is.
Sleep Regressions: What They Are
A sleep regression is a period of 2-6 weeks where a baby who was sleeping reasonably well suddenly starts waking more frequently, resisting naps, or needing more intervention to fall asleep. They are driven by developmental leaps — the brain is reorganising itself during periods of rapid skill acquisition, and this temporarily disrupts sleep architecture.
The most common regressions occur at:
- 4 months — The most significant and permanent. Sleep architecture matures from newborn sleep to adult-like cycles with more light-sleep phases. This one does not "pass" in the same way; the change is permanent, requiring a new sleep approach.
- 8-10 months — Coincides with crawling, object permanence, and separation anxiety development
- 12 months — Walking readiness and nap transition
- 18 months — Language explosion, emotional development, and the 2-to-1 nap transition
Our baby sleep regression guide covers each regression with specific strategies for the 4, 8, 12, and 18-month stages separately.
Sleep Training: Methods Overview
Sleep training refers to teaching a baby to fall asleep independently and self-settle when they wake between sleep cycles. The research is clear that multiple methods are safe and effective — the debate is about parental preference and temperament match, not harm.
| Method | Approach | Best For | Age Range |
|---|---|---|---|
| Ferber (Graduated Extinction) | Check-ins at increasing intervals; baby learns to self-settle between visits | Parents who want a structured system with check-ins | 5 months+ |
| Full Extinction ("Cry It Out") | Consistent bedtime routine, then no intervention until morning | Parents who find check-ins make crying escalate | 6 months+ |
| Chair Method (Sleep Lady Shuffle) | Parent sits near crib, moves further each night | Parents who want to be present without picking up | 6 months+ |
| Pick Up/Put Down (PUPD) | Pick up when crying; put down when calm; repeat | Younger babies; parents uncomfortable with any crying | 3-5 months |
| Fading | Gradually reduce parental involvement over 1-2 weeks | Gentle transition; takes longer | Any age |
For the Ferber method specifically — including the exact interval chart and what to do when check-ins make things worse — see our Ferber method sleep training guide. For a broader overview of all methods with a Canadian context, our toddler sleep training guide covers the transition from infant methods into the toddler years.
What the Research Says
A 2016 study in Pediatrics (Gradisar et al., PMID 27550982) followed infants through graduated extinction and bedtime fading versus a control group. At 12-month follow-up, there were no significant differences in infant stress levels (measured by cortisol), behaviour, attachment security, or parent-child relationship quality between the groups. Multiple systematic reviews have reached the same conclusion: established sleep training methods, done after 4-6 months, do not harm infants and do reduce parental sleep deprivation.
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Safe Sleep Rules in Canada
Health Canada and the Canadian Paediatric Society recommend the following for the sleep space of every infant under 12 months:
- Back to sleep, every time — for every sleep, until the baby can independently roll both ways
- Firm, flat sleep surface — Health Canada-approved crib, bassinet, or play yard mattress only
- No soft objects in the sleep space — no pillows, bumper pads, positioners, loose blankets, or stuffed animals until 12 months minimum
- Room sharing recommended for first 6 months — in the same room but in a separate sleep surface, not bed sharing
- No inclined sleepers — inclined seats and rockers are for supervised awake time only. Health Canada has recalled multiple inclined infant sleepers due to infant fatality risk.
- Room temperature 18-20°C — dress baby in one layer more than an adult would wear; feel neck or chest to check warmth, not hands or feet
For guidance on choosing a crib mattress that meets Canadian safety standards, our bassinets and baby beds safe sleep guide covers what to look for and what to avoid.
The Sleep Environment
The sleep environment for a baby functions on the same principles as for an adult, adjusted for developmental stage. The variables that matter most:
| Factor | Recommendation | Notes |
|---|---|---|
| Temperature | 18-20°C room temperature | Overheating is a risk factor for SIDS |
| Sound | White or pink noise at 50 dB max, 2m+ from crib | Continuous playback preferred; avoid looping files with gap artifacts |
| Light | Blackout for naps and bedtime | Even at 4 months, darkness signals melatonin production |
| Mattress firmness | Firm — no give when pressed | A mattress that conforms to an infant's face is a suffocation risk |
| Bedding | Fitted sheet only until 12+ months | Swaddle or sleep sack for warmth — no loose blankets |
As babies grow into toddlers and the sleep space transitions from crib to toddler bed, the furniture choices open up. Our baby bed progression guide walks through what Canadian parents actually need at each stage. Mattress Miracle carries Canadian-made solid wood bedroom sets including options for toddler and single sizes — the Joliette and Banff sets are popular for children's rooms because they hold up through multiple reassemblies without the cam-lock failure that flat-pack furniture develops over time. See the solid wood bedroom sets collection for current inventory.
Safe infant sleep starts with a firm, flat mattress surface. Mattress Miracle at 441½ West Street in Brantford carries firm crib mattresses that meet Health Canada safety guidelines. No pillows, no soft bedding, no inclined surfaces for infants under 12 months. Dorothy helps new parents in Brantford set up safe sleep environments and answers every question without judgment. Call (519) 770-0001.
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Call 519-770-0001Frequently Asked Questions
When can I start sleep training my baby?
Most paediatric sleep specialists recommend waiting until 4-6 months corrected age, when the brain has developed enough capacity to begin consolidating night sleep. Before 4 months, frequent night waking is biologically normal and expected — night feeds are still a nutritional need, not a habit to break. The Canadian Paediatric Society does not endorse sleep training before 4 months.
How do I know if my baby is overtired vs undertired?
An overtired baby typically becomes hyperactive and difficult to settle — crying escalates, arching, difficulty accepting the breast or bottle. An undertired baby will play happily in the crib without settling, or fall asleep briefly then wake again. The wake window table above is the starting point; adjust by 15-minute increments based on what you observe for your specific baby.
Is the Ferber method safe?
Yes. The Ferber method has been studied since the 1980s and multiple controlled trials, including a 2016 study in Pediatrics (Gradisar et al.), found no differences in infant cortisol levels, attachment security, or behavioural outcomes between infants who underwent graduated extinction and those who did not. The method is appropriate after 5-6 months.
What is a safe crib mattress in Canada?
Health Canada requires crib mattresses to meet the Cribs, Cradles and Bassinets Regulations. The mattress must be firm, flat, and fit snugly in the crib with no gap larger than 3 cm between the mattress edge and the crib frame. It should not compress noticeably when you press it with your palm. Pillow-top or plush crib mattresses are not appropriate for infants regardless of marketing claims.
My baby was sleeping well and suddenly is not. What happened?
The most likely explanation is a developmental sleep regression. The 4-month regression is the most common cause of a sudden and significant change in a previously good sleeper, because it represents a permanent change in sleep architecture rather than a temporary disruption. Review the wake windows for your baby's age, re-establish a consistent bedtime routine, and check our sleep regression guide for age-specific strategies.
Related Guides in This Series
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Sources: Gradisar M et al. (2016). Behavioral interventions for infant sleep problems. Pediatrics. PMID 27550982. | Health Canada. Safe Sleep for Your Baby. | Canadian Paediatric Society. Healthy sleep for your baby and child. | Hirshkowitz M et al. (2015). National Sleep Foundation's sleep time duration recommendations. Sleep Health. | Mindell JA et al. (2006). Behavioral treatment of bedtime problems and night wakings in infants and young children. Sleep. PMID 17068980.