If a newborn’s birth height is 48cm, this is a relatively short phenomenon. The vast majority of newborns are born with a length of about 50cm, if the newborn is 48cm is less than 50cm, this is considered a short case. Newborn babies are short, mainly due to the following reasons: first of all, in utero development is delayed, if the newborn in the mother’s womb there are symptoms of oxygen deficiency will lead to serious development backward, born short height, weight is also light. The second is that the newborn is a premature infant and will also appear short in height.