The Ferber Method, Explained

Two different things travel under this name, and almost every argument about the method is really a confusion between them: graduated extinction, which is a category with randomised trials behind it, and Ferber's particular schedule of check-in intervals, which has none. The category is what was tested: put her down awake, return on a rising schedule, reassure without lifting, leave again. The famous chart of minutes is one author's arrangement of that idea, from a trade paperback. It is one method among several, and the methods compared page sets out the rest.

Everything below follows from that split: what the trials found applies to the category, and what the numbers are is your decision.

Where the chart comes from, and why this site will not print it as guidance

The interval table everybody has seen — three minutes, then five, then ten, growing across a week — comes from Solve Your Child's Sleep Problems, and every version online is a reproduction of it. No publisher this site is allowed to cite reprints those numbers: not the NHS, not the AAP, not the NIH, not a paper on PubMed.

That is why the check-in chart on this site ships its intervals as editable defaults, with the attribution printed on the paper rather than left on the website. A sheet stuck to a fridge outlives every caveat on a web page, so the caveat goes on the sheet.

What follows is more freedom than the genre admits. The trials tested returning on a rising schedule, not those particular minutes, so your intervals can start where your household can hold them: starting at one minute is not doing it wrong, and starting at ten is not doing it better. The shape is what to be consistent about — leave, return on a plan you decided in advance, keep the returns short and dull.

What a night actually looks like

The routine happens as usual, then she goes into the cot awake. You say the short thing and leave.

When she cries, you wait your first interval, go in, stay under a minute or two, reassure her without lifting her out, and leave again while she is still awake. Then the next interval, which is longer. Intervals grow through the night, and most schedules grow them across the days too, so the first return on Thursday is longer than the first on Monday.

Three things surprise families on night one. The returns are short — under two minutes, doing very little, is the protocol rather than a hardness test. The crying often gets louder when you come in and leave again, which is ordinary rather than proof that going in was a mistake. And the check is a real one: nappy, temperature, a leg through the bars, anything that hurts. A baby who seems unwell rather than cross is a reason to stop.

Waking later is treated the same way, if you have decided to treat it at all. Plenty of families run the method at bedtime only for the first week, because that is where consistency is cheapest.

Naps are harder, and the reason is the daytime

Nights usually settle before naps do, often by a week or two. Worth knowing in advance, so the fortnight does not feel like a failure at eleven in the morning.

The reason families give is that the drive to sleep is weaker in the daytime, so the same interval buys much less: at night she is running on a full day of tiredness, and at ten in the morning she is not. No publisher cited here has measured that, so treat it as the mechanism rather than a finding. Either way it argues for a cap. Decide how long you will spend trying — half an hour, three quarters — then rescue the nap however works, in a pram or on you, so the day does not collapse into an overtired evening that undoes the night.

A rescued nap is not a broken method; it is what stops the last awake stretch running past what she can carry. The wake window calculator puts the by-age bands on your clock — bands rather than numbers, because no health body publishes a wake-window table — and the wake windows by age guide explains where they come from.

Night feeds are a separate decision

They are not part of the method, and nothing on this site attaches a month to them. Whether a baby still needs a feed in the night is a question for you and your pediatrician or health visitor, and the answer differs between two babies of the same weight.

What matters is deciding before bedtime rather than at the moment of asking. A common arrangement is one planned feed at roughly a fixed time, given calmly in the dark, with the intervals applied to everything else. What does not work is feeding on some wakings and not others depending on how tired you are, because the only pattern in that is to keep asking. If you are still choosing, when to start sleep training covers the ages the trials used.

Decide your stopping point at seven, not at two

Nothing published tells you how long to let a stretch of crying run, and any page handing you a number is telling you something it does not know. The stopping point is yours, and the useful trick is when you set it.

Choose it before the routine, while nobody is upset — a clock time, a total length, or a change in the character of the cry — and write it on the sheet with your intervals. If the longest interval arrives and she is still going, hold that interval and repeat it rather than escalating; if your line arrives, stop and settle her, and let that count as information rather than failure. It is the same decision at seven in the evening and at two in the morning, and only one of those hours is any good at making it.

Notes turn a fortnight into information: a printed night sheet with the time down, the returns and the time asleep shows a direction no single night can.

The Denmark rumour, refused in both directions

One of the most searched questions about this method is whether it is banned in Denmark. The honest answer: no publisher on this site's allowed list says any such thing, in either direction.

So this page will not repeat it, and will not deny it with the confidence somebody else asserted it. A claim about another country's law, sourced to nobody, is not one this site will carry — and a page stating it flatly, or flatly refuting it, is telling you something it does not know. That is an unsatisfying answer and it is the true one.

What the trials found, and what they did not measure

Two pieces of evidence stand behind the category, and both point the same way.

The first randomised infants aged 6 to 16 months to graduated extinction, bedtime fading or a sleep-education control. Both active methods produced significant sleep benefits over the control; salivary cortisol declined modestly in both; and at the twelve-month follow-up there were no differences in attachment measured by the strange situation, or in the children's emotional and behavioural problems. The second followed children whose sleep problems at seven months had been randomised to a behavioural intervention or to usual care, and compared them at age six on mental health, sleep, stress regulation, the child-parent relationship and maternal mental health. There was no evidence of differences on any outcome, and the authors concluded that behavioural sleep techniques have no marked long-lasting effects, positive or negative.

Read that last sentence twice: no lasting harm found, and no lasting benefit found either. Alongside both sits the task force review of 52 treatment studies, which reported 94% finding the behavioural interventions efficacious and over 80% of treated children improving in a way that lasted 3 to 6 months, with support for graduated extinction as a category.

Now the limits. Nobody tested Ferber's specific intervals. Nobody enrolled babies under six months, so none of this describes a four-month-old. The samples were modest, the follow-up finite, and absence of a found effect is weaker than proof of no effect. And none of it says whether this method suits your household — the one that fits is the one you can run the same way for a fortnight, which is a question about you.

When it is not a method problem

Waking is ordinary. The AAP's description of a good sleeper at this age is a child who wakes frequently but can get herself back to sleep, not one who sleeps ten unbroken hours, and it calls frequent waking developmentally appropriate. Nothing here implies a family should choose this method, or any method.

Whatever you choose, the sleep starts the same way: babies go down on their back for every sleep, day and night, on a firm flat mattress, in a cot clear of blankets, pillows, bumpers and soft toys, in your room for at least the first six months, with nothing weighted on or over them — the safe sleep basics page has the full version. A baby who cannot be settled at all, who is unusually sleepy, feeding poorly, not gaining weight, or whose cry does not sound like her usual one is not a method question but a conversation with your pediatrician or health visitor. This page is general information, not medical advice, and it cannot see your baby.