Sleep training teaches your baby to fall asleep independently, without being rocked, fed, or held to sleep. Most babies are ready to start between 4 and 6 months old, when their internal sleep cycles mature and they begin producing their own melatonin. Before that age, newborns can’t distinguish day from night and genuinely need overnight feedings, so sleep training won’t work and isn’t appropriate.
There’s no single “right” method. The best approach depends on your temperament, your baby’s temperament, and how much crying you’re comfortable with. Here’s what each method actually involves, how to set your baby up for success, and what to expect in the first week.
When Your Baby Is Ready
Two markers signal readiness: age and weight. Around 4 months, your baby’s circadian rhythm begins to kick in, meaning their body starts to organize sleep into longer nighttime stretches. Some babies aren’t ready until closer to 6 months, and that’s normal. A weight of roughly 14 pounds is a useful benchmark because babies at that size can typically go through the night without needing to eat.
Most babies start sleeping through the night by 6 months, but “sleeping through the night” doesn’t happen on its own for every baby. Sleep training bridges that gap by teaching your baby to self-soothe, meaning they learn to settle themselves back to sleep when they wake between sleep cycles instead of crying for you to intervene. If your baby was premature, use their adjusted age rather than their birth date when gauging readiness.
Setting Up the Room
Before you pick a method, get the sleep environment right. A room temperature between 68 and 72 degrees Fahrenheit is the sweet spot. Anything above 72 degrees may be too warm. Use a firm, flat mattress with only a fitted sheet. No blankets, pillows, stuffed animals, or bumpers in the crib. Always place your baby on their back.
Darkness matters. Babies develop their circadian rhythm partly through light exposure, so keep rooms bright and sunny during the day and dark at night. Blackout curtains help signal that it’s time to sleep. White noise can mask household sounds, but keep the machine across the room rather than right next to the crib.
Build a Bedtime Routine First
Every sleep training method works better with a consistent pre-sleep routine. This doesn’t need to be elaborate: a bath, a feeding, a book, a song, then into the crib. The sequence matters more than the specifics. After a few nights, your baby starts to recognize the pattern and anticipate sleep. Keep it under 30 minutes so it doesn’t become a stalling game as your child gets older. The key rule: put your baby in the crib drowsy but awake. If they’re already asleep when you lay them down, they haven’t practiced the skill you’re trying to teach.
Graduated Check-Ins (Ferber Method)
This is the most popular middle-ground approach. You complete your bedtime routine, put your baby down awake, and leave the room. When they cry, you wait a set number of minutes before going back in to briefly reassure them with your voice or a gentle pat. You don’t pick them up. Then you leave again and wait a slightly longer interval before the next check.
A common starting schedule: 3 minutes for the first wait, then 5 minutes, then 10 minutes. On the second night, you might start at 5 minutes and stretch to 10, then 15. Some families use longer intervals, starting at 10 minutes and building to 20 or 30. The check-in visits are intentionally brief. You’re showing your baby you’re still there, not re-entering the soothing process. If your presence seems to escalate the crying rather than calm it, shorter visits (or skipping them) may work better.
Full Extinction (Cry It Out)
This is the most straightforward method and often the fastest to produce results, but it involves the most crying up front. You put your baby in the crib, say goodnight, close the door, and don’t go back in. Your baby cries, sometimes intensely, until they fall asleep on their own.
That sounds stark, and for many parents it feels that way. Two things make it workable. First, the crying typically peaks on the first or second night and drops off sharply after that. Second, you’re not ignoring danger signals. If the pitch of the crying changes dramatically or it goes on far longer than previous nights, go check. You’re listening for distress versus protest. This method works best for parents who know that repeated check-ins will make things harder, either because their baby gets more upset seeing them leave again or because the parent will struggle to leave the room a second time.
The Chair Method
If you want to stay nearby while your baby learns, this is a gentler option. After your bedtime routine, place your baby in the crib and sit in a chair right next to it. Don’t pick your baby up or engage much. Just be a calm, quiet presence until they fall asleep. Then leave.
Every few nights, move the chair a little farther from the crib. Toward the middle of the room, then near the door, then just outside the door, and eventually you’re gone entirely. You don’t need a literal chair. You can stand and gradually position yourself closer to the door each night. The idea is a slow, visible withdrawal of your presence so your baby adjusts in small increments rather than all at once. If they wake and cry, come back to your current chair position and sit quietly until they settle. This method takes longer than Ferber or cry-it-out, often a week or two, but some parents find it much more tolerable emotionally.
Pick Up, Put Down
This is the most hands-on approach and tends to suit younger babies or parents who aren’t comfortable with extended crying. You put your baby in the crib awake. When they fuss, you pick them up and soothe them. Here’s the critical part: as soon as you see their eyelids start to droop, you put them back in the crib before they actually fall asleep. If they cry again, you repeat the cycle.
This can mean dozens of pickups in a single night at the beginning, which is exhausting. The tradeoff is minimal sustained crying. Over several nights, the number of pickups drops as your baby learns they can make the final transition to sleep while lying in the crib. This method requires patience, and it doesn’t work as well for babies who get more stimulated each time you pick them up. If your baby seems to escalate rather than calm with each pickup, a less interactive method may be a better fit.
What the First Week Looks Like
Regardless of method, the first three nights are usually the hardest. Night one often involves the most crying, sometimes 45 minutes to over an hour. Night two can be just as hard or occasionally worse (sometimes called an “extinction burst,” where the crying intensifies before it fades). By night three or four, most families see noticeable improvement. Many babies show consistent self-settling within a week with the more direct methods. Gentler approaches like the chair method typically take 10 to 14 nights.
Consistency is the single biggest factor in whether sleep training works. If you follow the method for three nights, then revert to rocking your baby to sleep on night four because it was a rough evening, you’ve essentially reset the clock. Your baby learns that enough crying eventually produces the old result, which makes the next attempt harder.
When to Press Pause
Illness and teething are legitimate reasons to stop sleep training temporarily. A baby with a fever, ear infection, or stomach bug needs comfort, not a learning exercise. Teething pain follows the same logic: treat it like sickness and return to sleep training once your baby is feeling better. Travel and major disruptions (a new sibling, a move) can also justify a pause. When you restart, go back to your method from the beginning. Most babies re-learn faster the second time.
Will Sleep Training Harm My Baby?
This is the worry that keeps many parents up at night, sometimes literally. The concern is that letting a baby cry damages the parent-child bond or floods their system with stress hormones. The existing research does not support this. Studies looking at children months and years after sleep training have not found differences in attachment security, emotional development, or behavior problems compared to children who were never sleep trained. The short-term stress of crying at bedtime is not the same as chronic, unresponsive neglect. You are still feeding, holding, playing with, and responding to your baby all day long. A few nights of protest at bedtime don’t undo that relationship.