If in the process of obstetric examination, ultrasonography suggests that there is a short humerus, about three to four weeks on the small side of the case, it is suspected that there is the possibility of malformation, but need to be combined with other relevant examination data and results, to be able to clarify the diagnosis of deformity, do not blindly make judgments. It is recommended that the patient should go to the local public tertiary hospital for the relevant examination, which also needs to be combined with the length of the femur, skull, pregnancy, heart development and so on, under the professional guidance of obstetricians and gynecologists, combined with the results of these specific examinations to progress in the assessment of fetal growth and development or whether there is a diagnosis of fetal anomalies.