The median standard height and weight for 18-month-old female babies should be 81.5 centimeters and 10.65 kilograms. In 2009 the national ministry of health research published “China’s growth and development of children under 7 years of age reference standard”, in which the median height and weight standard of 18 months girl child should be 81.5 centimeters, 10.65 kilograms. Generally around this standard are in the normal category. There is not much difference, but it should be noted that if the weight is greater than 14.9 kilograms, it is necessary to consider whether the child is too obese. On the other hand, if the height is less than 72.8 centimeters and the weight is less than 7.79 kilograms. Then you need to consider whether there is a developmental problem. The need for improvement or treatment should be assessed by a pediatrician. Do not blindly take supplements on your own or add foods that are not conducive to children’s digestion and absorption. When you notice a big difference in height and weight, you need to consult a pediatrician immediately to avoid delay in treatment.