Prepare yourself for a few difficult nights. Hearing your baby cry can be excruciating, as every parent knows. During the waiting periods, set a timer and go to a different part of the house, or turn on some music, so you don't have to hear every whimper. As one BabyCenter parent says, "The first week could be rough. Try to relax and know that when it's all over, everyone in your household is going to sleep more easily and happily."
Though many of the parents I see in clinic have put up with terrible sleep for years, sleep training is a safe and effective tool to help babies learn to soothe themselves at night. For this guide, I reviewed the literature on infant sleep. As director of the Pediatric Sleep Center at Yale University, I have extensive experience helping families to address sleep problems. I have also written a book on the topic, which was inspired by sleepless nights with my own children.
Create a comfortable sleep environment that's tailored to your child. Some babies need more quiet and darkness than others. Recordings of soft music or nature sounds or the sound of a gurgling aquarium can be soothing. Make sure the sheets are cozy (warm them with a hot water bottle or a microwavable heating pad, for example, before laying your baby down) and that sleepwear doesn't chafe or bind. Younger babies may sleep better when swaddled. Don't overdress your child or overheat the room.
It might be strange to think of sleeping as a skill that does not come naturally. As a new parent, you’re probably so exhausted that you pass out as soon as your head hits the pillow. Your baby, however, doesn’t have this same ability yet. Although they spend a lot of time sleeping, they need to learn when to sleep (day vs. night) and how to sleep. Until they do, they need your assistance, which is why you (as you should) help soothe them to sleep at bedtime and comfort them when they wake in the middle of the night. Sleep training is teaching your baby how to sleep without any help from you - just like you’re able to fall asleep without anyone there to help you do it.

Also on the far end of the cry it out spectrum is the Baby Wise approach by pediatrician Robert Bucknam and co-author Gary Ezzo. In their book On Becoming Baby Wise, they advise against feeding babies on demand around the clock and instead advocate a parent-led feeding, wake, and sleep schedule. Their method involves following a strict nap and sleep schedule and putting your baby down awake so she can learn to soothe herself to sleep. This means there will be some crying, especially at first, as your baby adjusts to your schedule.
Melissa incorporated the Zen Sack into her bedtime routine with Theo because the gently weighted center of the Zen Sack helps to calm babies and aids in teaching them to self soothe- which is what sleep training is all about! The gently weighted center actually mimics your touch offering comfort and security to your baby, even when you’re not there. The extra bit of pressure from the Zen Sack has been shown to help babies feel calm and fall back to sleep easier...super helpful for starting sleep training!
"My first cried it out, and all was well. My second cried it out but it took much longer until all was well. My third, if allowed to cry too long, literally freaked out. He threw himself around his crib and would rarely calm down and fall asleep. On the rare occasion that he fell asleep, he'd wake up within minutes screaming bloody murder. Letting him cry it out was clearly not working so I looked for other options. Find your child's groove. You'll be glad you did."
"I have a 6-month-old who has refused to sleep longer than 30 to 90 minutes day or night since he was born! I've tried everything out there except CIO. He's strictly breastfed and relies on that or rocking to get to sleep. He doesn't know how to soothe himself to sleep, and he naps for only 15 minutes. I'm severely sleep deprived. I don't have the heart for CIO, but I think I'll try the revised method where you pat him down and reassure him lovingly while allowing him the opportunity to comfort himself. He's been co-sleeping since day one, and it's going to be tough, but I'm at my wits' end and cannot function."
"By the time your baby is 3 months old and has developed a fairly predictable 24-hour pattern, it becomes more important for you to provide increasingly consistent structure. If you do your best to establish a reasonable and consistent daily routine and keep to it as much as possible, then it is likely that your child will continue to develop good patterns. If instead you allow the times of your child's feedings, playtimes, baths, and other activities to change constantly, chances are his sleep will become irregular as well."
Sleep experts who support the cry it out approach (as well as most pediatricians) disagree. They say it isn't traumatic for babies to cry alone for short periods of time with frequent check-ins by Mom or Dad – and the end result is a well-rested, happier child. They say no tears sleep strategies may cause babies to be overly dependent on comfort from a parent at bedtime, making it harder for them to learn to soothe themselves to sleep.
Simply put, sleep training—also called sleep teaching or sleep learning—is the process of helping your infant learn how to fall asleep and stay asleep. It’s also become a pretty controversial topic, with experts and parents speaking for or against various sleep-training techniques. “It’s like talking politics,” says TJ Gold, MD, a pediatrician at Tribeca Pediatrics in New York City. “But there’s no one right way to get your child to sleep through the night. There are a lot of different ways.”
"My daughter woke every hour on the hour in her crib. I tried every other method available. Finally, at 7 months, we let her cry it out. It took three to four weeks to complete the sleep training and even though it was the hardest thing I've had to do thus far, it was so worth it. She now sleeps about 10 hours a night and loves her crib. We're both happier and have more energy to play."
The most well known cry it out technique is the one developed by pediatrician Richard Ferber, director of the Center for Pediatric Sleep Disorders at Children's Hospital Boston. Ferber says that in order to fall asleep on their own and sleep through the night, babies have to learn to soothe themselves. Ferber believes that teaching a baby to soothe himself may involve leaving him alone to cry for prescribed periods of time.
The biggest reason why the solutions that work for one parent don’t work for another is simple. They’re not dealing with the same baby. Some babies are heavily reliant on sleep props. Others can’t sleep in a room that’s too warm. Some may not be getting enough daytime sleep, and others might be overtired. This baby might have developed an association between feeding and falling asleep, whereas that one might be ready to drop their second daytime nap. And, of course, it could be any combination of all of the above, or the many other sleep challenges that babies might experience.
Crying isn't the goal of this sleep training method, but advocates say it's often an inevitable side effect as your baby adjusts to sleeping on his own. They say the short-term pain of a few tears is far outweighed by the long-term advantages: A child who goes to sleep easily and happily on his own, and parents who can count on a good night's rest.
Hi @Adriana – Thank you for writing to us. Sorry to hear that your toddler is having issues with sleeping in her own crib and sleeping through the night! There are MANY parents that use gentle sleep training with their toddlers and even preschoolers and older! If that’s what you’re comfortable with – go for it! If you’d like help formulating a Plan just for her, please contact us for some more info and recommendations! Good luck Adriana!!

"I have a 6-month-old who has refused to sleep longer than 30 to 90 minutes day or night since he was born! I've tried everything out there except CIO. He's strictly breastfed and relies on that or rocking to get to sleep. He doesn't know how to soothe himself to sleep, and he naps for only 15 minutes. I'm severely sleep deprived. I don't have the heart for CIO, but I think I'll try the revised method where you pat him down and reassure him lovingly while allowing him the opportunity to comfort himself. He's been co-sleeping since day one, and it's going to be tough, but I'm at my wits' end and cannot function."
There are many different sleep training methods to choose from, but the most common methods are one of or a variation of one the five we've explained below. You might find that one of these methods sounds like it would be a perfect match for you, OR you might find aspects from each plan that you like. Just like Melissa said, don't feel like you need to stick to a certain method 100%. Make the plan work for you! 
Honestly, in our personalized consultations, we try to avoid this method as much as possible. If you are going to use cry it out, we recommend your baby is at least 6 months old, but preferably 10 months or older, when we expect almost all babies to be able to get through the night without a feeding. It is not for the faint at heart. We find that laying a foundation in the beginning with other strategies and techniques can reduce crying even if this method is used in the end, however.

There is no right or wrong method of sleep training; it all comes down to your unique baby and your unique parenting style. What works well for some babies does not work well for others, so do not be surprised if the techniques your friends or family members recommend don’t work the same way for your baby. The bottom line is to choose a technique that you feel comfortable with, and that you think will work well with your baby’s temperament.
Adapt the method to fit your family. If you want to try a method like this but find it too harsh, you can use a more gradual approach. For instance, you can stretch out Ferber's seven-day program over 14 days, increasing the wait every other night rather than every night. Remember your primary objective: To give yourself and your child a good night's rest.
There’s also no need to institute a regimented cry-it-out plan if what you’re currently doing is working for your family. But good sleep habits never hurt, and being able to fall asleep on one’s own is a necessary life skill. If you sleep-train at a time that’s developmentally appropriate for your baby and with the basic ingredients of healthy sleep in place, you can minimize the amount of crying your baby (and, let’s face it, you) will do.
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