The method
How long does the Ferber method take to work?
Many families see progress within three to seven nights, but it varies. What each night tends to look like, and when to pause or reassess.
Before you start, or somewhere around the second night, one question sits under all the others. How many nights of this before it gets easier?
The honest answer is that there is no fixed number, and nobody can promise one. The Sleep Foundation says many families see progress within three to seven nights of starting the Ferber method, and that the timeline varies with a child’s temperament and how consistently the plan is followed. The classic plan runs for seven nights. Many babies change within that week, some take longer, and Nights 2 and 3 are often the hardest. So the most useful rule is simple: try not to judge the method before about Night 4.
How long does Ferber take? What “working” actually means
It helps to be clear about what you are waiting for. “Working” rarely means a baby who goes from waking four times to sleeping twelve hours in one jump. More often it looks like this:
- your baby takes less time to fall asleep at bedtime
- you make fewer check-ins before they settle
- night wakings become fewer or shorter, and more of them end without you
Night waking itself is not the problem. The American Academy of Pediatrics notes that it is normal for a 6-month-old to wake during the night and go back to sleep after a few minutes. The goal is a baby who can do that second part on their own.
The research on how well this works is encouraging, though it does not give a night count. A review of 52 studies for the American Academy of Sleep Medicine found behavioral treatments effective in 94% of the studies, with over 80% of treated children showing clear improvement that lasted 3 to 6 months (Mindell et al., 2006). In a randomized trial of babies aged 6 to 16 months, graduated extinction (the research term for the Ferber method) led to large drops in how long babies took to fall asleep and how often they woke, compared with a control group (Gradisar et al., 2016). Studies describe groups, though, not your particular child.
What each night tends to look like
These are the waits the Ferber app uses, one row per night. The Ferber method chart explains how to read them.
| Night | 1st wait | 2nd wait | 3rd wait, then every wait |
|---|---|---|---|
| Night 1 | 3 min | 5 min | 10 min |
| Night 2 | 5 min | 10 min | 12 min |
| Night 3 | 10 min | 12 min | 15 min |
| Night 4 | 12 min | 15 min | 17 min |
| Night 5 | 15 min | 17 min | 20 min |
| Night 6 | 17 min | 20 min | 25 min |
| Night 7 | 20 min | 25 min | 30 min |
Waits are in minutes. After the third wait, keep repeating the third value until your baby is asleep. If your baby wakes later in the night, start again from that night's first wait.
Night 1 is often loud. Your baby is surprised by the change and says so. The waits are short, which makes the night possible for most parents.
Nights 2 and 3 can be harder than Night 1, and this is the point where many parents wonder whether it is working. When a response that always came (rocking, feeding, being held) stops coming, crying often gets stronger for a short time before it fades. This is called an extinction burst. The waits are also longer on these nights, so the same crying can feel like more. Our article on why Night 2 or 3 can be worse goes through it in detail, and the guide to Nights 2 and 3 covers how to get through them.
Nights 4 to 7 are when many families notice real change: shorter crying, fewer check-ins, fewer or shorter wakings. Some babies are settling within a few minutes by the end of the week. Others are still improving, just more slowly. The 7-night arc walks through the whole week.
After Night 7, if your baby still cries at bedtime or during wakings, keep using the Night 7 waits. There is nothing wrong with needing a few more nights.
Why some babies take longer
The Sleep Foundation names two things that shape the timeline: temperament and consistency. You cannot change the first. The second is the part you control.
- Night wakings handled differently from bedtime. The chart applies to every waking. When your baby wakes and cries, start again from that night’s first wait. A feed or a rock “just this once” at 2 a.m. teaches your baby that crying longer in the night brings the old help back.
- Different adults, different rules. If one parent checks in for a minute and the other stays until the baby is asleep, your baby is learning two systems. Agree on the waits and the check-in before Night 1.
- Check-ins that grow. A check-in that turns into rocking or picking up to sleep becomes the new way to fall asleep. Keep visits short and calm.
- A feed your pediatrician wants kept. That is fine. Keep that one feed and use the chart for the other wakings. Whether your baby still needs a night feed is a question for your pediatrician, not the chart.
- An off day. A skipped nap, a busy afternoon or a change in routine can make one night harder. One hard night inside a week is not a trend.
When progress is slow but real
Tired memory is unreliable. After two short nights, everything feels the same or worse. A simple record helps: when you put your baby down, how many check-ins, when they fell asleep, how many wakings. Compare Night 1 with Night 4, not last night with tonight.
Some setbacks come after the week is over. The Sleep Foundation notes that children can have “post-extinction bursts,” suddenly going back to behavior that seemed gone, and that this is normal. If it happens, respond the same way you did during the week.
It may also help to know you are not on a deadline. In one Australian trial of babies aged 6 to 12 months, more sleep problems had resolved after two months in families who used a behavioral approach than in families who received information only. By four months, the two groups looked similar (Hiscock and Wake, 2002). The method helped sooner, and many sleep problems also eased with time. Among mothers who started with higher depression scores, those scores also fell further in the behavioral group.
When to pause, reassess or stop
After illness or travel, many families restart at an earlier night on the chart rather than where they left off, because a few nights of extra help can bring back old habits. The guide to teething and illness covers pausing in more detail.
If nothing has changed after about a week of consistent nights, not the time to fall asleep, not the check-ins, not the wakings, talk to your pediatrician. Also mention snoring, pauses in breathing, poor weight gain, reflux or feeding worries at any point, whatever night you are on.
If the method is not right for your family, that is a real answer too. A slower approach like the chair method or bedtime fading may suit you better, and a plan you can stick with matters more than which plan it is. It is also fine to wait, or not to sleep train at all.
If you are running on empty, say so to someone. Exhaustion is real, and if your mood is low or you are having frightening thoughts, please talk to your doctor. That matters as much as anything on the chart.
Whatever night you are on, safe sleep stays the same: baby on their back, on a firm, flat surface in their own crib or bassinet, with no pillows, bumpers, blankets or soft toys. The AAP’s safe sleep guide has the full list.
A plan for tonight
Decide now that you will run the plan as written through at least Night 4 before you judge it, unless your baby is unwell. Write down tonight’s waits, agree on the check-in with anyone else who will be doing it, and start a short log in the morning.
The Ferber app keeps that log for you. It runs each night’s waits, restarts from the first wait after a night waking, and saves every night in a sleep history, so on a hard Night 3 you can see how Night 1 actually went.
Common questions
How many nights does the Ferber method take?
There is no fixed number. Many families see progress within three to seven nights, and the classic plan runs for seven. Some babies change faster and some take longer, depending on temperament and how consistently the plan is followed.
Is it normal for Night 2 or 3 to be worse than Night 1?
Yes. Crying often gets louder or longer for a night or two when a familiar response stops, before it drops. This is called an extinction burst. It is common and usually short, so try not to judge the method before about Night 4.
What if the Ferber method has not worked after a week?
If you have followed the plan consistently for about a week and nothing has changed, not the time it takes your baby to fall asleep, not the number of check-ins, not the wakings, talk to your pediatrician. It is also fine to try a gentler approach or to stop.
Should I keep going if my baby gets sick?
No. If your baby is sick, in pain or vomiting, stop and comfort them. When they are well again, many families restart at an earlier night on the chart rather than where they left off.
Sources
- Sleep Foundation: The Ferber Method
- Mindell JA et al. Behavioral treatment of bedtime problems and night wakings in infants and young children. Sleep, 2006
- Gradisar M et al. Behavioral interventions for infant sleep problems: a randomized controlled trial. Pediatrics, 2016
- Hiscock H, Wake M. Randomised controlled trial of behavioural infant sleep intervention to improve infant sleep and maternal mood. BMJ, 2002
- American Academy of Pediatrics (HealthyChildren.org): Getting Your Baby to Sleep
- American Academy of Pediatrics (HealthyChildren.org): A Parent's Guide to Safe Sleep