There is no definitive conclusion on how many milliliters of milk a day is normal for a preterm baby of 4 pounds, and it is usually about 120 to 150 ml/kg for feeding on demand. Premature babies are fetuses that are delivered at 28 weeks of gestation but less than 37 weeks. There is no relevant authoritative information specifying how many milliliters of milk a day is normal for a preterm baby 4 pounds, it is not clear. However, in general, preterm babies 4 pounds a day to eat about 120 to 150 ml / kg of milk, the specific amount of milk feeding, need to be based on the actual situation, there are obvious individual differences. Regarding the feeding of preterm infants, the principle is to feed on demand, generally the younger the gestational age, the lower the birth weight, the smaller the amount of milk per feeding, the interval between feedings also need to be shortened, and then adjusted according to the weight gain situation can be appropriate.