For the majority of newborns born at full term, the average weight of a newborn is between 2500-4000g. If a newborn’s weight falls within this range, it is normal. Newborns who weigh significantly less than 2500g or more than 4000g are caused by adverse factors. If the newborn’s weight is significantly lower than 2500g, it is mostly due to premature birth or intrauterine dysplasia. In this case, the newborn should be given timely nutrition and even placed in a warm box for warmth. If the newborn’s weight is significantly higher than 4,000g, it is often due to a condition such as diabetes. In this case, the newborn’s diet should be properly controlled, and it is best to convert the amount and frequency of breastfeeding according to the newborn’s weight.