The five main baby sleep training methods are: full extinction (cry-it-out), graduated extinction (Ferber), the chair method, pick-up-put-down, and fading. They all work — the research shows comparable results. The biggest predictor of success isn't which method you choose. It's whether your baby's wake windows are calibrated correctly before you start.
If you start sleep training with a baby who's overtired or undertired at bedtime, no method will work. The method comes second. The timing comes first.
With that said — here's an honest breakdown of every method, who it's for, and what to try tonight.
What this guide covers
- 1The thing nobody tells you about sleep training (it's not the method)
- 25 methods compared — speed, crying level, and who they suit
- 3What the research actually says (Gradisar et al., AAP, Pennestri)
- 4When to start — the developmental window
- 5The most common reason sleep training fails
The thing nobody tells you about sleep training
Most sleep training posts start with the method. This one starts with what matters more.
According to Gradisar et al. (2016), the landmark sleep training RCT published in Pediatrics, both graduated extinction (Ferber) and bedtime fading produced results — and there was no measurable difference in cortisol, attachment, or behavior outcomes at 12 months. The method matters less than you think.
What does matter: timing. A baby who arrives at bedtime overtired (cortisol spike, fight-or-flight mode) cannot be trained to sleep easily — no matter which method you use. A baby who isn't tired enough will resist falling asleep independently.
Before you start any method
- Make sure your baby's bedtime wake window is correct for their age
- Aim for drowsy-but-awake — not wide awake, not already asleep
- Run your bedtime routine consistently for 5–7 nights before making changes
- Pick one method and commit to it for at least 5–7 nights before evaluating
The 5 methods at a glance
Full Extinction (CIO)
3–5 nightsCrying
High initially
Parent effort
Low
Put baby down awake. No check-ins until morning. Hard the first night, often resolves quickly.
Best for: Parents who can tolerate crying, want fastest result
Ferber (Graduated Extinction)
3–7 nightsCrying
Moderate
Parent effort
Moderate
Put baby down awake. Check in at timed intervals (3 min → 5 min → 10 min), no picking up. Intervals lengthen each night.
Best for: Parents who want structure and need to offer reassurance
Chair Method (Sleep Lady Shuffle)
2–3 weeksCrying
Low–Moderate
Parent effort
High
Sit beside crib until baby sleeps. Move chair 1–2 feet further every 3 nights. Exit the room by week 3.
Best for: Parents who want to stay present; works best if your presence is calming
Pick Up / Put Down
1–2 weeksCrying
Low–Moderate
Parent effort
High
Put baby down awake. Pick up when crying, put down when calm. Repeat. Most babies respond in 3–5 days.
Best for: Parents of babies under 6 months; can overstimulate older babies
Fading (Shush–Pat)
1–3 weeksCrying
Low
Parent effort
Very High
Pat and shush until baby sleeps in the crib. Gradually reduce speed and volume over days. Replace holding with patting, then fade patting.
Best for: First step away from contact napping or holding to sleep; gentle transition
Each method, explained
Full Extinction (Cry-It-Out)
You put baby down awake at bedtime and don't go back in until morning (or the next feed if still night-feeding). No check-ins.
It's the fastest method. Most babies who don't have a wake window issue sort it out in 3–5 nights. The first two nights are the hardest.
Is it safe?
Yes. Gradisar et al. (2016) found no difference in cortisol levels, attachment security, or behavioral outcomes at 12 months between babies who did cry-it-out and those who didn't. The AAP endorses behavioral sleep interventions including extinction.
Tonight: Put baby down at the right wake window. Say goodnight. Don't go back in. Set a time limit (e.g. 6 AM) so you're not guessing.
Ferber Method (Graduated Extinction)
Put baby down awake. Leave the room. Check in at increasing intervals — typically starting at 3 minutes, then 5, then 10, then every 10 minutes until asleep. Don't pick up. Keep check-ins brief (under 30 seconds).
Each subsequent night, the intervals lengthen. Most babies show dramatic improvement by night 3–4.
Ferber check-in schedule
Tonight: During check-ins, don't pick up, make eye contact, or linger. A calm “I love you, it's time to sleep” and back out. Longer check-ins often make things worse.
Chair Method (Sleep Lady Shuffle)
Sit in a chair next to the crib while baby falls asleep. Don't pick up or make prolonged eye contact. Every 3 nights, move the chair a few feet further — to the door, then outside the room.
Low crying, but high parent effort and patience required. One caveat: some babies find your nearby presence more stimulating than calming, especially after 6 months.
Tonight: Pick your starting chair position — right beside the crib. Commit to staying until baby is asleep, but keep interaction minimal. No talking, no eye contact, just your calm presence.
Pick-Up / Put-Down
Put baby in the crib awake. When they cry, pick up until calm, then put back down. Repeat. It sounds exhausting — and for many babies over 6 months, it is, because the picking-up becomes overstimulating.
Most effective for babies under 5–6 months. After 6 months, consider switching to the chair method or Ferber.
Tonight: Pick up only for full crying — not fussing. Put down the moment they calm. Most babies respond in 3–5 days if the timing is right.
Fading (Shush–Pat)
The most gradual approach. You help baby fall asleep in the crib with decreasing amounts of support — starting with full patting and shushing, then reducing over days and weeks. No crying required if done correctly.
This is the first step away from contact napping or nursing to sleep. You're not removing all comfort at once — you're replacing holding with patting, then fading the patting.
How fading works over time
- Week 1: Put down drowsy, pat and shush until asleep
- Week 2: Pat less actively, reduce shush volume
- Week 3: Still hand on body, no patting
- Week 4: Your presence nearby is enough
Tonight: Find the nap window where your baby isn't overtired. Put down drowsy — heavy eyelids, relaxed hands, calm body — and start with full patting and shushing. Don't rush the fade.
When to start sleep training
Most pediatric sleep researchers recommend starting around 4–6 months.
Before 4 months, babies' sleep is biologically fragmented — their circadian rhythm hasn't matured. Sleep training in the newborn period usually doesn't stick because the underlying biology isn't there yet. As Cleveland Clinic notes, consistent sleep patterns typically emerge by 3–4 months.
You can also start later — many families wait until 6, 8, or even 12 months. Sleep training is effective at any age; it may just take slightly longer with older babies who have more entrenched habits.
Hold off if…
- Baby is sick or in the middle of a growth spurt
- You're traveling or the routine is disrupted
- Baby is going through a sleep regression (e.g. 4-month, 8-month)
- Major life change in the house (new baby, moving, starting daycare)
The #1 reason sleep training fails
It's not the method. It's not inconsistency (though that matters). It's the wake window.
If your baby is overtired at bedtime — even by 20–30 minutes — their cortisol is elevated. You're not training a sleepy baby to fall asleep independently; you're trying to train a wired, stressed baby. It almost never works.
If your baby is undertired, they have no sleep pressure — falling asleep independently is harder than it should be.
Wake windows are the most underrated variable in sleep training. That's why Cocoo starts every sleep coaching plan with a detailed troubleshooting chat — covering your baby's full sleep and life pattern, your parenting style, and what you've already tried — before recommending a personalized approach.
Quick wake window targets by age (at bedtime)
What the research actually says
Gradisar et al. (2016), published in Pediatrics: Randomized controlled trial comparing graduated extinction (Ferber), bedtime fading, and control. Both sleep training methods worked. No difference in cortisol, attachment, or behavior at 12 months. "No detrimental effects were found."
Pennestri et al. (2018): Night wakings are developmentally normal even after successful sleep training — “sleeping through the night” (per Henderson et al.) just means a 5-hour stretch, not zero wakings.
AAP (2022) endorses behavioral sleep interventions. See healthychildren.org.
Frequently asked questions
What is the Ferber method for sleep training?
The Ferber method (graduated extinction) has parents put baby down awake, then check in at progressively longer intervals — starting at 3 minutes, then 5, then 10 — without picking up. It teaches babies to fall asleep independently while giving parents a structured way to offer reassurance. Most babies respond in 3–7 nights.
Is cry-it-out harmful to babies?
The research consistently shows no. Gradisar et al. (2016) ran a randomized controlled trial in Pediatrics and found no difference in stress hormones, attachment, or behavior outcomes between sleep-trained and control groups at 12 months. Both graduated extinction and bedtime fading were equally effective and safe.
What is the chair method for sleep training?
The chair method (sleep lady shuffle) has parents sit in a chair next to the crib while baby falls asleep, then move the chair a few feet further away every 3 nights. After 2–3 weeks, you're outside the room. It's a very gradual approach — though some babies find the parent's nearby presence more stimulating than calming.
When should I start sleep training my baby?
Most pediatric sleep experts recommend starting around 4–6 months, when the circadian rhythm has matured enough to support longer sleep stretches. The AAP notes that sleep training is most effective after 4 months. Before that, sleep is biologically fragmented — it's not the right developmental window.
Which sleep training method works fastest?
Full extinction (cry-it-out) typically produces results fastest — often 3–5 nights. Graduated extinction (Ferber) follows at 3–7 nights. Chair method and fading take 1–3 weeks. The 'best' method is the one you can follow consistently — inconsistency is what makes all methods fail.
More from the Cocoo blog
Sources
Gradisar, M., et al. (2016). Behavioral interventions for infant sleep problems: A randomized controlled trial. Pediatrics, 137(6), e20160069. publications.aap.org
Pennestri, M. H., et al. (2018). Uninterrupted infant sleep, development, and maternal mood. Pediatrics, 142(6), e20174330.
Henderson, J. M. T., et al. (2010). Sleeping through the night: The consolidation of self-regulated sleep across the first year of life. Pediatrics, 126(5), e1081–e1087.
American Academy of Pediatrics. (2022). Getting your baby to sleep. healthychildren.org
Mindell, J. A., et al. (2009). A nightly bedtime routine: Impact on sleep in young children and maternal sleep and mood. Sleep, 32(5), 599–606.
Not sure which method fits your family?
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