Sleep training means teaching a baby to fall asleep and resettle independently, using anything from the structured Ferber method to fully gentle, low-cry approaches like the chair method. Most methods are designed for babies past the newborn stage, once nighttime sleep starts to consolidate, and the right choice depends on a family's tolerance for crying and consistency.
Choosing among sleep training methods gets simpler with one framework: the Readiness-Response Framework. It has two parts. Readiness asks whether a baby's age and stage make structured training realistic. Response asks how much crying and hands-on comfort a family wants to build into the method — from checking in briefly (Ferber) to staying close the whole time (gentle methods) to stepping back further (cry it out). Once you place a baby on the readiness side and pick a point on the response spectrum, the rest of the plan follows naturally. Related routines, like a consistent baby sleep schedule, make any method easier to apply.
The Ferber method, developed by Dr. Richard Ferber, is a graduated extinction approach. A baby is put down drowsy but awake at the start of the night. If crying continues, a parent checks in briefly — offering a short, calm reassurance without turning on lights, feeding, or picking the baby up for an extended time — and then leaves again. Over the following nights, the wait before each check-in gets progressively longer, so the baby has more opportunity to practice settling on their own before a parent returns.
Because it involves brief, timed check-ins rather than a single full separation, the Ferber method sits in the middle of the response spectrum: less hands-on than gentle methods, but with more parental contact than full cry it out. Consistency across every night and every caregiver matters more than any single check-in interval, since a baby who is picked up on some nights and not others has a harder time learning the new pattern.
Gentle sleep training methods keep a parent physically present for longer, trading a slower pace for less crying at any one moment. These approaches still aim to teach a baby to fall asleep with less direct intervention over time, but the transition happens in smaller, more gradual steps.
The chair method is one of the best-known gentle techniques. A parent sits in a chair next to the crib while the baby falls asleep, offering a calm, quiet presence without picking the baby up. On each following night, the chair moves a little farther from the crib — toward the door, then into the hallway — until the baby is falling asleep without a parent in the room. It is a good fit for families who want to stay close during the process, though it typically takes more nights of steady repetition than faster, less hands-on methods.
Most sleep training methods are designed for babies past the newborn stage, once nighttime sleep starts to consolidate into longer stretches rather than the frequent round-the-clock waking typical of the first weeks. Sleep needs shift with age — the CDC notes infants around 4 to 12 months typically need about 12–16 hours of sleep across day and night, compared with 14–17 hours for newborns, reflecting the broader shift toward more consolidated nighttime sleep as a baby matures (Source: CDC).
Many parents begin exploring structured sleep training methods around the 4-month mark, a stage often associated with more organized sleep-wake patterns compared with earlier weeks. Readiness still varies by baby, so it is worth watching for a baby's own signs of settling into a more predictable rhythm rather than following a strict calendar date, and discussing timing with a pediatrician, especially for a baby born early or with any medical concerns.
Whichever method a family chooses, a few basics make any sleep training approach more likely to work. Start with a short, predictable bedtime routine — the same few calming steps every night. Put the baby down drowsy but still awake, rather than already asleep, so the crib becomes the place sleep begins. Pick one method and one plan for handling night wakings, and apply it consistently across every caregiver and every night, since inconsistency is one of the most common reasons a method seems not to work. A calm sleep environment, including familiar sound, can also help; see best noise machines for sleep and baby sleep music for options some families use as part of the routine.
At 4 months, techniques tend to start gentler and shorter, since sleep patterns are still maturing. A consistent pre-sleep routine, a full daytime feeding schedule, and a brief settling window before responding to fussing (rather than immediate full extinction) are common starting points, with families moving toward more structured methods like Ferber or cry it out as the baby gets a little older, if needed.
Sleep training a 2 year old looks different from training an infant, because a toddler can understand simple rules and has usually moved from a crib to a bed, or can climb out of one. Techniques for this age often combine a steady bedtime routine with tools suited to a toddler's understanding, such as a bedtime pass or a parent staying in the room and gradually reducing interaction, rather than the check-in style used for younger babies. Toddlers aged 1–2 years generally need about 11–14 hours of sleep in a 24-hour period, which is useful context when judging whether overnight wakings reflect a sleep-training issue or simply a schedule that needs adjusting (Source: CDC).
Newborns, generally considered the first 0–3 months, are usually too young for structured sleep training methods like Ferber or cry it out. This age group needs about 14–17 hours of sleep spread across day and night, broken up by frequent feeds, which is a normal and expected pattern rather than something to correct with a training method (Source: CDC).
For the newborn stage, the priority is safe sleep rather than independent-settling techniques. Always place a baby on their back to sleep, on a firm, flat surface, and never on a couch or sitting device. Room-sharing without bed-sharing can lower the risk of Sudden Infant Death Syndrome (SIDS) by up to 50% (Source: CDC). Since the "Safe to Sleep" campaign launched in 1994, SIDS incidence has dropped by more than 50%, underscoring how much these basic habits matter before any formal sleep training begins (Source: NICHD Safe to Sleep).
Cry it out, sometimes called full extinction, is the least hands-on point on the response spectrum: a baby is put down for the night and, apart from checking for safety or a legitimate need, is left to settle without parental intervention until morning. It differs from the Ferber method mainly in the absence of scheduled check-ins — Ferber offers brief, timed reassurance, while classic cry it out does not.
Because it involves the most crying with the least immediate parental response, CIO is also the method families feel most strongly about in either direction. There is no single "correct" choice among Ferber, gentle methods, and CIO — the right one is the one a family can apply consistently, night after night, without switching approaches partway through.
Sleep training is a parenting choice, not a medical treatment, but a few situations are worth discussing with a pediatrician before or during the process:
These conversations are consistent with pediatric guidance to bring safe-sleep and infant sleep questions to a child's doctor (Source: American Academy of Pediatrics).