The Ferber Method Explained: Is Cry It Out Right for Your Baby...
Learn the ferber method explained: is cry it out right for your baby.... Practical strategies and answers to common parent questions.
Medical Information
The information on this page is for educational and informational purposes only. It is not medical advice and should not be used to diagnose or treat any medical condition. Always consult your healthcare provider (doctor, midwife, or nurse) before making any decisions about your pregnancy or your baby's health.
Sleep deprivation is genuinely one of the hardest aspects of new parenthood. When a baby who's developmentally ready to sleep through the night isn't doing so, parents understandably look for solutions. The Ferber method is one of the most researched — and most misunderstood — sleep training approaches available.
Here's what it actually involves, what the research shows, and how to decide if it's right for your family.
What Is the Ferber Method?
The Ferber method (also called "graduated extinction" or "progressive waiting") was developed by Dr Richard Ferber, director of the Centre for Paediatric Sleep Disorders at Boston Children's Hospital, and detailed in his book Solve Your Child's Sleep Problems.
The core concept: babies who haven't learned to fall asleep independently often need a parent to recreate their sleep-onset conditions whenever they wake during the night (which is normal — all humans cycle between light and deep sleep). By learning to fall asleep without a sleep prop (feeding, rocking, parental presence), babies can resettle themselves when they wake naturally.
The method is NOT about leaving your baby to cry indefinitely. It involves checking in at gradually increasing intervals.How the Ferber Method Actually Works
The Nightly Process
- Follow a consistent bedtime routine (bath, feed, story, song — roughly 20–30 minutes)
- Put your baby in their cot awake but drowsy
- Say goodnight and leave the room
- If they cry, wait a set amount of time before going in to briefly comfort them
- When you go in: speak soothingly, briefly pat or touch them — do not pick them up or feed them
- Leave again — even if they're still crying
- Wait progressively longer intervals before the next check
The Waiting Intervals
Dr Ferber suggests a progressive schedule where you wait slightly longer before each check:
| Night | First wait | Second wait | Third wait | Subsequent |
|-------|-----------|------------|------------|------------|
| 1 | 3 min | 5 min | 10 min | 10 min |
| 2 | 5 min | 10 min | 12 min | 12 min |
| 3 | 10 min | 12 min | 15 min | 15 min |
| 4–7 | 12 min | 15 min | 17 min | 17 min |
These intervals are starting suggestions — some families use shorter or longer waits based on their comfort.
Who Is the Ferber Method For?
Good candidates:
- Babies aged 4–6 months and older who are developmentally ready to sleep through the night
- Babies who are healthy and gaining weight well (not needing feeds for nutritional reasons)
- Families who have tried gentler approaches without success
- Parents who feel they cannot sustain the current sleep situation
Not appropriate for:
- Babies under 4 months
- Babies with medical conditions or developmental concerns
- Times of major change (illness, travel, new sibling, house move)
- Families who are not fully committed — inconsistency makes it worse and more distressing for everyone
What Does the Research Say?
The Ferber method has been studied more than almost any other parenting intervention. Key findings from peer-reviewed research:
- Effectiveness: Multiple randomised controlled trials show significant improvements in sleep in 3–7 nights
- Cortisol: A frequently cited concern is that crying raises cortisol (stress hormone). Studies measuring infant cortisol during Ferber training show initial elevation that normalises rapidly — and longitudinal studies show no lasting elevation
- Attachment: Long-term studies following children for years after sleep training find no differences in parent-child attachment, behaviour, or emotional outcomes compared to control groups
- Mental health: Some studies show improved maternal mood and relationship satisfaction after sleep training, given the relief from extreme sleep deprivation
The most comprehensive review, published in Pediatrics in 2016, found that sleep training techniques including extinction and graduated extinction were safe and effective, with no harmful effects on child development, attachment, or parental mental health.
Common Challenges and Solutions
"My baby cries more when I go in to check"
Some babies find check-ins more stimulating than soothing — they see you, get more upset when you leave again. If this is your baby, consider reducing check-ins or transitioning to a full extinction approach (no checks).
"I can't bear to hear them cry"
This is completely valid. Some parents try Ferber and decide it's not for them — there are gentler alternatives. What matters most is finding an approach your whole family can consistently follow.
"They were doing well and then regressed"
Sleep regressions can disrupt progress at 4 months, 8–10 months, and 18 months. Return to the method consistently after the regression passes."My partner and I disagree"
Both caregivers need to be aligned. One parent undoing the training by picking the baby up defeats the process and causes more confusion and distress overall.
Alternatives to the Ferber Method
If Ferber doesn't feel right for your family, other sleep training approaches include:
- Chair method (Sleep Lady Shuffle): Parent gradually moves further from the cot over 1–2 weeks
- Pick-up-put-down: Pick baby up when crying, put down when calm — repeated until asleep
- No-cry approaches: Elizabeth Pantley's methods focus on slowly adjusting associations without any crying
- Full extinction (Weissbluth method): No check-ins — often faster results but harder for parents
Setting Up for Success
Before starting any sleep training:
- Ensure your baby's sleep environment is safe and optimised
- Choose a stretch of 5–7 days with no major disruptions planned
- Ensure both caregivers are aligned and committed
- Prepare for 2–3 hard nights — things usually get significantly better after that
Use the Contraction Timer approach as a mindset: track the intervals so you know exactly when to check in, removing the guesswork and anxiety of wondering how long it's been.
The Bottom Line
The Ferber method is well-researched, effective for most babies when applied at the appropriate age, and has not been shown to cause harm. Whether you choose it depends on your baby's temperament, your own comfort with hearing your baby cry, and your family's particular situation.
There is no single "right" approach to infant sleep. The best method is the one you can implement consistently, that helps everyone in the family get the sleep they need.
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Frequently Asked Questions
At what age can I start the Ferber method?
Most sleep experts recommend waiting until at least 4–6 months of age, when babies have developed the neurological capacity to self-soothe and no longer need night feeds for nutrition. Always consult your paediatrician before starting.
How long does Ferber sleep training take?
Most families see significant improvement within 3–7 nights. Some babies adapt within 2–3 nights; others take up to 2 weeks. Consistency is the most important factor.
Does the Ferber method cause psychological harm?
Multiple peer-reviewed studies, including long-term follow-up research, have found no evidence that Ferber-style sleep training causes harm to the parent-child attachment relationship, stress hormones, or child development outcomes.
PregnancySprout Editorial Team
Our editorial team researches every article against primary medical sources — NHS, WHO, NICE, and RCOG guidelines. We are health writers and parents, not doctors; content is reviewed for accuracy but does not constitute medical advice.
✓ Fact-checked against NHS, WHO, and NICE guidelines