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.
"A young child cannot yet understand what is best for him, and he may cry if he does not get what he wants," Ferber writes. "If he wanted to play with a sharp knife, you would not give it to him no matter how hard he cried, and you would not feel guilty or worry about psychological consequences. Poor sleep patterns are also harmful for your child and it is your job to correct them."
Do your research, talk to your doctor and if you’re overwhelmed, consider hiring a sleep consultant or taking a workshop. Your baby’s sleep might seem like a mystery to you, but there are people who understand the complexities and can help. While not everyone agrees with every approach, no one would argue with the benefits of a good night’s sleep, for babies and exhausted parents alike.
Finding the ideal bedtime can be tricky in the first few months of life. Infants who take a late afternoon nap (say, 4 to 6 p.m.) may go to bed as late as 9 or 10 p.m. A good rule of thumb is that your baby will probably sleep three to four hours after his last nap ends, but you may need to experiment, adjusting your baby’s nap and bedtime schedule to figure out what works best.
As your baby gets older and their sleep needs change, make sure that you’re adjusting wake times, naps and bedtimes accordingly to help them continue to easily fall asleep and stay asleep. Some parents think of sleep training as a “one-and-done” endeavour: You endure a lot of crying for a few days and your prize is a perfect sleeper. But it’s really a lifestyle change—once your child has the skills to fall asleep, they’ll still need routines, consistency and help adapting when life throws curveballs, like starting daycare, the arrival of a new sibling or going on a trip (where they may have to sleep in a different space or crib). Colds and illnesses, as well as time changes, can also throw a wrench in your perfect schedule. The trick here is to get back on track as soon as possible. If you start allowing or enabling the old, bad habits and sleep associations, it will take longer to return to the regular routine.
Sleep training is a loaded phrase, and one that is often used synonymously with letting your baby self-soothe, or “cry it out,” but that’s not the whole picture, says Alanna McGinn, a certified sleep consultant and the founder of Good Night Sleep Site. “It’s more about being able to teach your baby that they are capable of falling asleep independently,” she says. You want your baby to be able to nod off on their own—ideally without nursing, rocking or using a pacifier—because whatever tools they use to fall asleep at bedtime are the same things they’re going to wake up looking for during the night. Yes, this can feel unloving and even downright cruel. You’ll find experts on both sides of the issue: Breastfeeding advocates say it’s normal for babies of all ages to wake up multiple times to nurse, and even the sleep coaches interviewed for this article disagree with how much crying and distress are acceptable.