Newborns often lack stamina when they breastfeed and are largely "flow-dependent," which means they need your breasts to have a good flow, or milk supply in order for them to keep going. If your milk flow starts to slow down, your baby's sucking-and-swallowing pattern will also slow. This means he'll either stop swallowing at regular intervals or fall asleep at your breast.
In a nutshell, babies want their food to come fast and easy—a theme that will no doubt repeat itself well into their teen years and beyond!
Here are two important points to remember about breastfeeding, especially during the first few weeks:
Source: Heather Kelly is an International Board Certified Lactation Consultant (IBCLC)