When do baby sleep through the night if breastfeeding?

Varies: Babies vary on when they begin to sleep through the night. Breastfed babies often sleep an extended period within the 2-4 week after birth, but may still wake up at night for at least one feeding. Some people feel adding a little watery cereal at bedtime by spoon may help stretch the one long sleeeping time during the night, but it usually should not be started until about 3 mos. Of age.