How long a baby sucks at the breast is considered full, it needs to be judged according to the baby’s daily habits and the mother’s feeding experience. 1. Baby’s habits: if the baby is full, he or she will show inattention, looking around, and the strength of sucking on the nipple will gradually decrease; after he or she is full, he or she may cry, which means that the baby wants to play or sleep, and then he or she has to stop breastfeeding. 2. Mom’s feeding experience: If the amount of breastmilk is sufficient and the baby sucks more strongly, the sucking time will be shorter, and the baby may eat for 5-10 minutes, and the baby will be full. If the amount of breastmilk is less or the baby’s sucking strength is weaker, the baby may eat for 15-20 minutes. If the sucking time is more than twenty minutes, it may indicate that the mother’s breastmilk is insufficient, and then she needs to add formula milk in order to make the baby full. It should be noted that the mother’s body should be at the same level when breastfeeding the baby, and the baby should not be fed immediately after crying, which is easy to choke.