Many babies come out of total darkness in utero, into a hospital delivery room and then nursery, where the lights are on 24 hours a day. To help shorten your baby's adjustment period, first, minimize stimulation at night. Feed, burp, change, and hold your baby quietly, quickly, and in the dark. During the day, try to keep your baby awake and active for 20 minutes after each feeding by changing positions, moving around, and providing visual stimulation and a variety of sounds. Given that in the very beginning, feeding, burping and diapering may take nearly an hour, that leaves you with barely two hours of sleep at a time.
Some babies start sleeping through the night on their own around three or four months.
But most babies need at least one night feeding for quite a while longer. If your baby seems hungry both during the day and at night, he might still really need that 2am feeding. Into the Crib Awake Many young infants are accustomed to falling asleep at the breast or while being rocked in a parent's arms. This works well for the first two to three months. But between three and four months, it is very important to start putting your baby down in the crib awake every time she goes to sleep.