How much milk powder does a 20-day baby eat?

A 20-day-old baby should generally eat 75-90mL, once every four hours, but the child is premature or low-weight, sometimes eat less, sometimes can eat about 65-75mL, also eat once every four hours. There are also older children, giant children sometimes 75mL is not enough, you can add a little 80mL, four hours to eat once, so the child and the child's physique is not the same, weight is not the same, children eat milk powder changes, not the same, according to the child's weight, size, choose the appropriate amount to eat.