The baby’s upper body is long and the lower body is short is a normal phenomenon. Because the baby’s physical growth to follow the head and tail rule, in the early head in the womb and infancy, the head leading growth, and later head growth is not much. At birth, the head is large, the body is small, the limbs are short, the head accounts for 1/2 of the body length at birth, until 12 years old when the upper body and lower body equal length, after gradually appearing lower limbs are often longer than the upper body. So it is not abnormal for babies to have long upper body and short lower body, and you can take your child to the child health department for regular medical checkups to get proper guidance.