Sleep training methods: which one is right for your baby?

When to start sleep training

Sleep training is generally not recommended before 4 months. Before that age, babies have tiny stomachs, no circadian rhythm, and genuinely need to feed frequently overnight. Asking a 6-week-old to "learn" to sleep independently is unrealistic and can interfere with establishing milk supply.

Between 4 and 6 months, most babies:

• Can go longer stretches between feeds (5–6 hours overnight is common by 5 months).
• Have developing circadian rhythms that respond to light and routine.
• Are developmentally ready to begin learning to fall asleep without a prop (feeding, rocking, or holding).

The American Academy of Sleep Medicine notes that healthy, full-term babies can generally begin gentle sleep training from 4–6 months. Always check with your pediatrician first, especially if your baby was premature or has any health conditions.

Method 1: Ferber method (graduated extinction)

Developed by Dr. Richard Ferber in the 1980s, this is often called "cry it out" — though that label is slightly misleading. The Ferber method uses timed check-ins, not total abandonment.

How it works:

• Put your baby down drowsy but awake at bedtime.
• Leave the room. If crying continues, return after a set interval (e.g. 3 minutes the first night).
• Offer brief, calm reassurance — no picking up. Leave again.
• Gradually increase the waiting intervals each night (3 min → 5 min → 10 min and so on).

Most families see results within 1–2 weeks. Research, including a 2016 randomised controlled trial in Pediatrics, found no lasting harm to infant attachment or stress levels compared to non-sleep-trained groups.

Best for: parents who can tolerate some crying and want relatively fast results.

Method 2: Full extinction (unmodified CIO)

This is the strictest version of cry-it-out, associated with Dr. Marc Weissbluth. You put baby down awake and do not return until morning (or a set feed time). There are no check-ins.

It typically works in 3–7 nights. It is the fastest method studied, but also the hardest emotionally for most parents. Research shows no increase in cortisol or behavioural problems at follow-up, though the emotional cost to parents is real.

Best for: families where check-ins make the crying worse (some babies escalate when a parent appears and then leaves again).

Method 3: Chair method (sleep lady shuffle)

Popularised by Kim West, the chair method is a gradual-retreat approach. A parent sits in a chair beside the cot while the baby falls asleep, offering vocal reassurance without picking up. Every few nights, the chair moves further from the cot until the parent is outside the room.

The full process takes 2–3 weeks. It involves less acute crying than Ferber or CIO, but can be longer overall because the parent's continued presence sometimes keeps the baby stimulated.

Best for: parents who cannot tolerate crying alone and prefer a visible, slow transition.

Method 4: Fading method

Fading (also called "camping out" or "gradual withdrawal") means you continue your current sleep association — rocking, feeding to sleep, or patting — but do less of it each night. Over 1–3 weeks you progressively fade the prop until the baby falls asleep independently.

For example, if you rock until fully asleep, you might rock until drowsy on night 1, until eyes-fluttering on night 3, until calm-but-awake on night 7, and just place in the cot by night 14.

Best for: families who want a very gentle, low-cry approach and are prepared for a longer timeline.

Method 5: No-cry method

Developed by Elizabeth Pantley (The No-Cry Sleep Solution), this approach focuses on breaking the feed-to-sleep or rock-to-sleep association through small, patient steps — without letting the baby cry at all. Techniques include the "Pantley pull-off" (unlatching before full sleep), adjusting nap timing, and consistent bedtime routines.

Results can take several weeks to months. It requires the most consistency and patience, but is the most compatible with a co-sleeping or attachment-parenting philosophy.

Best for: parents who are strongly opposed to any crying and are prepared for a slow, incremental process.

What does research say?

A systematic review published in Sleep Medicine Reviews (2020) found that behavioural sleep interventions — including both extinction and fading approaches — are effective at reducing night wakings and improving sleep consolidation. Importantly, no study has found evidence of long-term emotional, developmental, or attachment harm from any of these methods when used with healthy babies from 4 months.

The key factors that predict success across all methods are:

• Consistency — applying the chosen method every night without switching.
• Timing — starting when the baby is biologically ready (not before 4 months).
• Parental wellbeing — a method you can sustain without severe distress is more likely to work than the "fastest" option if you abandon it after two nights.

How to choose a method

There is no universally "best" method. Consider:

• How much crying can you tolerate? If the answer is "very little", start with fading or the no-cry approach.
• How urgent is it? If you are severely sleep-deprived and need results in a week, Ferber or CIO may be more practical.
• Does your baby escalate with check-ins? Some babies cry harder when a parent appears and then leaves — full extinction may actually cause less total crying for those babies.
• What is your baby's temperament? Highly sensitive babies often do better with slower, lower-stimulus approaches.

Whatever method you choose, a consistent bedtime routine — bath, feed, story, song — in the same order every night sets the stage and is proven to improve sleep independent of the specific sleep training approach.

Frequently asked questions

When is the right age to start sleep training?

Most experts recommend waiting until 4–6 months, when babies have developed enough to go longer between feeds and their sleep cycles are more mature. Before 4 months, frequent night waking is biologically normal and sleep training is generally not advised.

Does the Ferber method cause lasting harm?

Research to date has not found lasting negative effects on attachment or emotional development from graduated extinction (Ferber). A 2016 study published in Pediatrics found no significant difference in stress hormones, emotional development, or parent–child attachment between sleep-trained and non-sleep-trained groups at 12 months.

Which sleep training method works fastest?

Extinction (full cry-it-out) typically produces results in 3–7 nights. The Ferber method usually takes 1–2 weeks. Chair and fading methods can take 2–4 weeks. The no-cry method is the slowest, often taking several weeks to months, but involves the least crying.

Can I track sleep training progress with an app?

Yes. Logging sleep times before, during, and after sleep training helps you spot patterns — for example, whether night wakings are decreasing week over week. The Bebblo app lets you log sleep with a single tap and keeps all history on your phone, with no mandatory account required.

Track sleep training progress with Bebblo

Bebblo logs each sleep with a single tap — start time, end time, duration — and builds a history you can review day by day. Seeing the trend in black and white makes it easier to stay consistent and know whether the method is working. Free, no mandatory account, data stays on your phone.

This article is for general guidance and does not replace advice from your doctor or pediatrician.