Sleep training teaches a baby to fall asleep independently, without being rocked, fed or held to sleep. The goal is not to stop night feeds or ignore a baby’s needs. It is to help the baby learn the skill of self-settling so they can go back to sleep between sleep cycles without calling for help every time. An AASM task force reviewed 52 studies and found that behavioral sleep interventions are effective in 94 percent of cases, with no evidence of harm (Mindell et al. 2006).
Not sure your baby is old enough? The baby sleep calculator checks age-appropriate sleep targets, and the baby 24-hour sleep calculator compares logged hours to recommended ranges.
When To Start Sleep Training
Most sleep experts and pediatricians recommend starting between 4 and 6 months. By 4 months, the baby’s sleep architecture has matured into adult-like cycles, and the circadian clock is established. Biologically, the baby is ready to learn to self-soothe (Goodlin-Jones et al. 2001, Cleveland Clinic).
Signs of readiness include:
- The baby is at least 4 months old (adjusted for prematurity).
- They can fall asleep independently at least some of the time.
- Night feeds are becoming less necessary (your pediatrician can confirm).
- The baby is healthy with no acute illness or upcoming medical procedure.
Always check with your pediatrician before starting, especially for premature babies or babies with medical conditions.
Sleep Training Methods Compared
| Method | Crying level | Parent involvement | Typical results |
|---|---|---|---|
| Cry It Out (extinction) | High at first | Low (leave the room) | Fastest (3 to 5 nights) |
| Graduated extinction (Ferber) | Moderate | Brief timed check-ins | Fast (5 to 7 nights) |
| Chair method | Low to moderate | High (sit in room, move away over days) | Gradual (1 to 3 weeks) |
| Pick Up Put Down | Low to moderate | High (pick up to calm, put down awake) | Gradual (1 to 3 weeks) |
| Bedtime fading | Minimal | Moderate (shift bedtime later, then back) | Gradual (1 to 3 weeks) |
| No-cry approaches | Minimal | Very high (gentle replacement of habits) | Slow (2 to 6 weeks) |
Cry It Out (Unmodified Extinction)
Place the baby in the crib drowsy but awake, say goodnight, leave the room, and do not return until the next scheduled feed or morning. The baby may cry hard on the first night, but most babies fall asleep within 30 to 60 minutes. By the third to fifth night, crying usually drops to under 10 minutes (Cleveland Clinic).
This method works the fastest, but it is emotionally difficult for parents. It is not for everyone, and there is no evidence that gentler methods produce worse long-term results (Mindell et al. 2006).
Graduated Extinction (Ferber Method)
Put the baby down awake, leave the room, and wait a set number of minutes before going back for a brief check-in (30 to 60 seconds of patting or verbal reassurance, without picking up). Increase the wait time each visit: for example, 3 minutes, then 5, then 10. Reset the intervals each night or gradually extend them (Cleveland Clinic).
A randomized controlled trial of 43 infants found that graduated extinction reduced the time it took to fall asleep and reduced night waking, with no increase in stress hormones and no negative effects on attachment at the 12-month follow-up (Gradisar et al. 2016).
The Chair Method (Gradual Withdrawal)
Sit in a chair next to the crib until the baby falls asleep. Every 2 to 3 nights, move the chair further from the crib until you are outside the room. The baby learns to fall asleep without your direct touch but with your presence fading gradually (Cleveland Clinic).
This method involves less crying but requires patience and consistency. It works well for families who want to stay nearby but need the baby to stop needing to be held or rocked.
Pick Up Put Down
When the baby cries, pick them up and comfort them until calm but still awake, then put them back down. Repeat as many times as needed. Over several nights, the baby learns that the crib is the place for sleep, not your arms (Cleveland Clinic).
This method is gentle but can be exhausting and overstimulating for some babies, especially those over 6 months who may find the repeated picking up more exciting than calming.
Bedtime Fading
If the baby fights sleep at the current bedtime, push bedtime later to align with when they naturally fall asleep. Once the baby is falling asleep quickly and easily, gradually move bedtime earlier by 15 minutes every few nights until you reach the target time (Cleveland Clinic).
The Gradisar 2016 trial tested bedtime fading alongside graduated extinction and found that both methods reduced sleep onset time, though graduated extinction also reduced night waking (Gradisar et al. 2016).
No-Cry Approaches
These methods replace existing sleep associations (nursing, rocking, bouncing) with new ones (patting, shushing, a lovey after 12 months) without letting the baby cry. They take the longest but suit families who are not comfortable with any crying.
The trade-off is time. What a cry-based method achieves in 3 to 7 nights may take 2 to 6 weeks with a no-cry approach. Consistency is key with any method, but even more so here.
Is Sleep Training Safe?
The evidence consistently shows that behavioral sleep training does not harm babies. The key studies:
- Mindell et al. 2006: An AASM task force reviewed 52 studies covering more than 2,500 children. Ninety-four percent of studies reported that sleep interventions were effective, and none found lasting harm (Mindell et al. 2006).
- Gradisar et al. 2016: A randomized controlled trial found no increase in cortisol (stress hormone) levels in babies who underwent graduated extinction or bedtime fading, and no negative effects on the parent-child relationship at 12 months (Gradisar et al. 2016).
- Price et al. 2012: A 5-year follow-up of 326 children who had or had not undergone behavioral sleep training found no differences in emotional health, behavior, or the parent-child relationship (Price et al. 2012).
Important: Sleep training is about teaching the skill of falling asleep independently. It is not about ignoring a baby’s needs. Night feeds should continue as long as the pediatrician recommends, and a sick baby should always be comforted.
How To Choose A Method
There is no single best method. The best one is the one you can follow consistently for at least a week. Consider:
- Your tolerance for crying. If hearing the baby cry is very distressing, start with the chair method or bedtime fading rather than extinction.
- Your baby’s temperament. A stubborn, high-energy baby may respond faster to graduated extinction. A sensitive baby may do better with gradual withdrawal.
- Your schedule. Faster methods require a few intense nights. Gradual methods spread the effort over weeks.
- Consistency. Whichever method you choose, both parents and all caregivers must follow the same plan. Inconsistency teaches the baby to cry longer because it sometimes works.
For a step-by-step bedtime plan, use the bedtime routine planner. A solid routine is the foundation of every sleep training method (Mindell 2018). And if the issue is timing rather than method, the baby sleep schedule by age guide can help set the right wake windows and nap structure.
Setting Up For Success
No method works well without the right foundation. Before you start sleep training, get these basics in place:
- Fix the schedule first. A baby who is overtired or undertired will fight any method. Use the baby sleep schedule by age guide to confirm that wake windows and nap timing are age-appropriate. If total sleep seems off, the sleep calculator by age and gender gives a quick benchmark.
- Build a bedtime routine. Three to four calming steps in the same order every night: bath, pajamas, book, song. The routine should end in the room where the baby sleeps with the lights low. Research shows that a consistent routine alone can reduce night waking and improve sleep quality (Mindell 2018).
- Darken the room. Light suppresses melatonin. Use blackout curtains or shades so the room is dark enough that you cannot read a book. A small night light outside the room is fine for hallway navigation.
- Get all caregivers on the same page. If one parent rocks the baby to sleep and the other puts them down awake, the baby gets mixed signals. Both parents, grandparents and any regular caregivers must follow the same plan.
- Check health first. Rule out ear infections, reflux, allergies or any medical condition that could cause pain at night. Sleep training a baby who is in discomfort is unlikely to work and is not fair to the child. Talk to your pediatrician before starting (Cleveland Clinic).
For newborns under 4 months, sleep training is not appropriate. Focus instead on safe sleep basics and building healthy habits. The newborn sleep guide covers what to expect in the first 12 weeks, and the children’s sleep guide maps sleep needs from birth through the teen years.
FAQs
Will My Baby Feel Abandoned If I Use Cry It Out?
Research does not support this concern. The Gradisar 2016 trial measured stress hormones and attachment at 12 months and found no negative effects. The Price 2012 follow-up found no harm at age 5 (Gradisar et al. 2016, Price et al. 2012).
Can I Sleep-Train While Still Breastfeeding At Night?
Yes. Sleep training and night weaning are separate decisions. You can teach the baby to fall asleep independently at bedtime while still offering a dream feed or responding to hunger cues at night (HealthyChildren.org).
What If Sleep Training Is Not Working After A Week?
Check that the timing is right (baby is at least 4 months, not sick, not mid-regression), the routine is consistent, and all caregivers follow the same rules. If it still is not working, pause for a few weeks and try again or consider a different method (Cleveland Clinic).
Is It Too Late To Sleep-Train A Toddler?
No. Sleep training works at any age, though methods shift. For toddlers, clear rules, a visual routine chart and consistent consequences replace check-in intervals. The toddler sleep schedule calculator sets age-appropriate bedtimes for children 1 to 5.
Do I Need To Stop Night Feeds Before Sleep Training?
No. Many families keep one or two night feeds while sleep training at bedtime. The baby learns to fall asleep without help but still eats when hungry. Ask your pediatrician how many night feeds are still needed (HealthyChildren.org).
Can I Combine Methods?
Yes. Some families start with the chair method and switch to timed check-ins once the baby is used to the routine. The key is to avoid going back and forth within a single night, which confuses the baby and extends the process (Cleveland Clinic).