“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!"
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."
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.
This sleep training technique usually involves quite a bit of crying on your baby’s part for the first couple of nights but some say it tends to be less crying, overall, since sleep training is ‘done’ faster (for many, but not all, people). The way it works is simple – you do your bedtime routine, put your baby to bed awake, and then leave the room without returning for checks. If your baby cries, you are not supposed to go in to check on her; instead, you let her ‘cry it out’ on her own. The thinking here is that if you allow your baby to cry for a period of time, but then go in and ‘rescue’ her, you have all but guaranteed that she will cry for that amount of time the next night because she will expect you to come and “rescue” her again.
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.