“I always say bedtime and nap routines can start from day 1. A child is never too young to learn healthy sleep habits and routines! But to get a baby sleeping through the night there are a few things I check. The baby should be at least 15 lbs, no medical concerns, and on a healthy growth curve approved by their pediatrician. If all these points are met, then I'm ready to start getting that little one sleeping through the night!"
The benefits of sleep training baby can be substantial: Everyone in the household will be well rested, and sleep is essential to baby’s development. A landmark 2007 study from the National Institutes of Health suggested that critical brain-development periods are dependent on adequate sleep. “Sleep training baby may not be fun, but I always tell families that it’s not dangerous, and developing good sleep hygiene is, in my opinion, one of the best things you can do for your child,” Gold says.
• Know there will be regressions. Teething, illness, vacation and routine shifts all can lead to poor sleep, and that’s all right, Vance says. “Often, you may have to go back to training for a day or two to get back on track, but you won’t lose ground. If your child has been trained to be a good sleeper, one week off schedule because of vacation won’t change that.”
Proponents of these sleep training methods say it's okay for your child to cry when you put him to bed and leave the room, although they don't advocate letting a baby cry indefinitely. Typically, these methods suggest putting your baby to bed when he's still awake and allowing short periods of crying punctuated by comforting (but not picking up) your child.
If your baby is older than six months, don’t worry, McGinn says: “It’s never too late to develop good sleep habits.” Dickinson says he finds nine months to be a bit of a sweet spot for parents in terms of getting babies to sleep through the night. “They are at a good age for understanding routines and don’t need to eat during the night,” he explains.