When breastfeeding, you can judge whether the child is full by the baby’s sucking state, weight gain, urine output and so on. 1. The baby’s state: when the baby even has a stable swallowing action and swallowing sound, sucks the breastmilk for about 15 minutes, the baby appears to be satisfied with the state, the frequency of sucking action decreases, and the expression is calm and happy, then the baby has basically eaten enough. 2. Weight gain: in the long run, if the baby’s weight growth is stable and development is good, it means the baby is full. 3. Urine volume: more than six wet diapers per day, generally indicates that the baby intake is sufficient. There are other ways to determine whether the baby is full, if the baby does not gain weight, insufficient urine or persistent crying, etc., you need to consult a doctor in a timely manner to find out the cause, to determine whether the breast milk is insufficient or the baby is not fed properly caused by the baby did not eat enough and so on.