The amount of milk for newborns varies from person to person and varies greatly from one person to another. Normal full-term newborns have a milk quantity of about 30 ml each time after birth, and the number of feedings per day is 8-10 times during the newborn period. 2 weeks old newborns have a milk quantity of 60-90 ml, and 3-4 weeks old newborns have a milk quantity of about 90-120 ml. In the case of premature babies, the amount of milk is related to the gestational age and weight at birth, and the amount of milk varies greatly. For formula-fed newborns, it is appropriate to feed them with water once between formula feedings. As long as conditions allow, breastfeeding is currently advocated. Although the amount of milk varies greatly among newborns, the weight growth of newborns is objective, and it is only normal for newborns to grow between 10-30g per day.