Before you start any sleep-training method, make sure all the necessary people are on board. Talk to your pediatrician to rule out any underlying medical condition, such as reflux or GERD, sleep apnea, or allergies, that may be keeping your child awake at night. Then make sure you and your partner are on the same page; plan together how you'll react to wakings at given times. If your 10-month-old is nursing six times a night, both of you must agree that you'll feed him once before bed, then not again until morning.
Most experts recommend starting when your baby is between 4 and 6 months old. By about 4 months, babies have typically started to develop a regular sleep-wake cycle and dropped most of their night feedings. These are signs they may be ready to start sleep training. Many babies this age are also developmentally able to sleep for long stretches at night.
"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."
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.