There is no specific treatment for short legs in pregnancy ultrasonography, and it is necessary to clarify the specific cause of the disease and decide the specific treatment according to the patient’s condition. When pregnant women ultrasonography suggests fetal short legs, first need to rule out the existence of gestational week calculation error, such as fetal gestational week calculation error can lead to the development of fetal indicators on the small side, appearing short legs, timely calibration of the expected date of birth, correct the gestational week can be. If the fetus has short legs and the gestational week is correctly calculated, further examination should be performed to determine whether there are other structural developmental abnormalities in the fetus, and if necessary, amniocentesis should be performed to determine whether there are abnormalities in the fetus, and to terminate the pregnancy as soon as possible if there are abnormalities. When the examination indicators of the fetus are abnormal, individualized treatment should be carried out under the guidance of professional physicians to avoid delaying the condition and leading to adverse consequences.