Getting started with Ferber, in one read

You picked a hard week to be a parent on purpose. That deserves credit, and it deserves a clear plan. This guide is the plan: who Ferber is for, what to prepare, what tonight will look like, and what to do when the obvious things go wrong. Read it once and you are ready to start.

Is your baby ready

Three quick checks before you commit to a week of sleep training:

• Age. Six months or older. Dr. Ferber’s published minimum is four months, but the consensus among pediatric sleep specialists, including the Sleep Foundation and Huckleberry, is six. The app will not let you start before then for a reason.
• Health. No fever, no cold in the past 48 hours, no recent vaccinations in the past 48 hours, no recent ear infection. Sleep training a baby who is unwell is unfair to both of you and produces bad data.
• Stability. No travel this week. No house guests. No daycare-start in the past two weeks. If your week is bumpy, pick a different week.

If you cleared all three, keep reading. If you did not, the ages guide and the troubleshooting hub have what you need to wait well.

The gear list, such as it is

You almost certainly own everything you need. Make sure you have:

• A safe sleep surface with a firm mattress and no loose bedding.
• A baby monitor with audio. Video is nice, not required.
• A way to check the time without a glaring screen. The Ferber app counts the intervals so you do not have to.
• A bedtime routine you already use. If you do not have one, start it tonight, same order, same length, every night this week.

That is the whole list. There is no Ferber-specific product to buy. If a sleep training program is selling you a thirty-dollar bedtime aid, that is not sleep training, that is merchandise.

What to tell the other adults in the house

Sleep training works best when everyone in the house knows the plan. Pick one adult to be the primary check-in person each night. Switching mid-night confuses the baby and causes inconsistent check-ins, which lengthens the arc by a night or two. The non-check-in partner gets the harder job: not going in.

If you have older children, tell them that the baby is learning to sleep on their own and that the adults have a plan. Older children almost always cope better than parents expect when they are told the plan, including when the plan involves crying.

Night 1, in order

After your usual bedtime routine, including a feed if that is part of your routine and is signed off by your pediatrician:

1. Put your baby down drowsy but awake. This is the part most parents skip. If you put a sleeping baby down, the night gets harder, not easier.
2. Leave the room. Start the timer. Three minutes.
3. If your baby cries, you wait the full three minutes.
4. Go in. Under a minute. Pat or talk softly. Do not pick up. Do not turn on the light.
5. Leave. Five minutes.
6. Go in. Same rules.
7. Leave. Ten minutes.
8. From here, every check is ten minutes apart until your baby falls asleep.

Here is the table for tonight, in case the app is not in front of you yet:

Night	First wait	Second wait	Third wait	Then repeat
Night 1	3min	5min	10min	10min

After the third interval, the third value repeats until your baby falls asleep.

When your baby wakes again later in the night, you start from the top. Three, then five, then ten. Each waking gets the full sequence. Yes, that is on purpose. Yes, it works.

The next morning

Write down two things, even if it is in a phone note:

• What time your baby fell asleep.
• How many times they woke up before morning, and what time each waking was.

The Ferber app does this for you. If you are using it, you can skip the note.

Do not interpret Night 1. The data point that matters is the trend across the first three nights, not Night 1 alone. Some Night 1s look terrible and turn into perfect Night 3s. Some Night 1s look fine and the baby decides to test the boundary on Night 2. That is normal. Trust the arc.

What if it is not working

It almost always is working, even when it does not feel like it. The two real failure modes are:

• Inconsistency. The most common one. A check-in that turns into a feed, a check-in where the baby gets picked up, a partner who breaks the protocol on Night 2 because Night 1 was loud. Pick a check-in plan and hold to it.
• Wrong week. Fever, ear infection, cutting a tooth, hitting a milestone like rolling or pulling to stand. Pause. Try again in a week. The troubleshooting guides walk through the diagnostic flow.

If neither of those is the problem and you are on Night 4 with no improvement, talk to your pediatrician. There may be a reflux, feeding, or developmental factor that needs a different conversation.

What the app does for you

We built Ferber for the moment at 2:13 a.m. when you are not going to do mental math. The app:

• Runs the interval timer with a calm chime, not a glaring red.
• Logs each check-in so you can see what tonight actually looked like.
• Pre-loads the next night’s intervals so you do not have to remember the table.
• Picks up exactly where you left off if you pause for an illness.
• Lives behind a widget so you can start tonight in one tap.

You can run Ferber without the app. Plenty of parents have, since 1985. We just made the part you do at 2 a.m. easier.

If you are ready, you know where to go.