The standard height of a 5-week-old girl is 110.2 cm and her weight is 18.26 kg. A 5-week-old girl whose height is between 107.3 and 113.1 cm is within 1 standard deviation up and down and can be observed, and is usually considered normal. If the height of a 5-week-old baby girl is less than 102.3cm, she should be considered short, in which case she should take her child to the hospital for an orthopantomogram of the left wrist joint, i.e., a bone age examination, to clarify whether her height is late or short according to the actual functional examination results. This will help to maintain the height and weight at a normal level.