Timed check-ins, explained: how they work night by night

Timed check-ins are the approach people usually mean when they say “sleep training.” You put your baby in the crib awake, say goodnight and leave. If they protest, you come back at set times to reassure them briefly, then leave again.

It’s the fastest of the three approaches in Seven Nights. It also tends to bring the most protest early on. Here’s how it works, step by step, so you can decide whether it fits your family.

The idea behind check-ins

Every baby wakes briefly between sleep cycles. Babies who fall asleep being fed, rocked or held often need that again at every wake, because that’s the only way they know how to fall asleep. Our guide to sleep associations explains this in more detail.

Check-ins give your baby space to practise falling asleep in the crib on their own, while you still show up regularly to let them know you’re nearby. You’re not leaving them to figure it out alone. You’re giving them room to try, with a predictable rhythm of reassurance.

Before the first night

Set up the room: dark, steady white noise, cool and calm.
Check the crib is safe: firm flat mattress, fitted sheet, nothing else in it. Baby goes on their back.
Pick a bedtime between 6:30 and 8:00 p.m.
Use the same 20-minute routine every night, with the feed first and the lights on.
Agree with your partner on the plan and who’s doing which nights.

If your baby is unwell or cutting a painful tooth, wait until they’re better to start.

How a check-in works

At the end of the routine, put your baby in the crib awake. Say your goodnight phrase, something short like “Goodnight, I love you, time to sleep,” and leave the room.

If they protest, wait for the first interval. Then go in and:

Keep it under a minute.
Use a calm, quiet voice and the same few words each time.
A gentle pat or hand on the tummy is fine.
Don’t pick them up, and keep the lights off.
Leave while they’re still awake, even if they’re still upset.

Then wait for the next interval and repeat. The intervals lengthen as the night goes on. On Night 1, a typical pattern is 3 minutes, then 5, then 10, and 10 minutes for every check-in after that. Over the following nights the intervals get a little longer.

If your baby is quiet or just fussing softly, you don’t need to go in. Check-ins are for protest, not for every sound.

Night by night: what to expect

Every baby is different, but a common pattern looks like this:

Nights 1–2: the most protest. This is new and your baby is telling you so. Stay calm and stick to the intervals.
Nights 3–4: protest often starts to shorten, though some babies push back harder for a night before things improve.
Nights 5–7: many babies begin to settle with less fuss and fewer check-ins, and night wakings may start to link up.

There are no guarantees on timing. Some babies settle quickly, others take longer. What helps most is doing the same thing every time.

Night wakings and feeds

Use the same approach for wakings during the night: same words, same intervals, same short check-ins. Starting fresh at the first interval each time is fine.

Night feeds are a separate decision. Keep them until your pediatrician says reducing is ok. If a feed is due, feed your baby calmly, then put them back in the crib awake. If your baby is unwell or not gaining weight well, keep feeding and call your pediatrician. This is educational information, not medical advice.

Is this approach right for you?

Check-ins suit parents who want a faster change and can handle a few harder nights to get there. If listening to crying is very hard for you, a gentler approach may work better. The chair method lets you stay in the room, and bedtime fading keeps protest to a minimum.

All three teach the same skill. The best one is the one you can keep doing calmly and consistently. If you’re worried about the effect of crying, studies that followed sleep-trained babies for years found no harm to attachment or behavior. For more on choosing, see how to choose a sleep approach you can actually stick with.

If you want a plan for tonight

Seven Nights gives you tonight’s check-in intervals on your phone in Bedtime Mode, with a timer and the words to say, and adjusts the plan after each morning check-in. See how the 7-night plan works.