The chance of misdiagnosis of clubfoot is extremely low, around 1%. This is because when pregnant women undergo ultrasound examination, if the fetus is suspected of having entropion, the doctor will ask the pregnant women to observe the fetus several times after the activity to determine whether the fetus foot can return to the normal position, and in particular, he will dynamically observe the process of the fetus’s lower limb activity. If the fetal foot is compressed by the uterine wall and the placenta due to low amniotic fluid or localized low amniotic fluid, and the fetal foot is inverted, the doctor will make multiple sweeps to avoid misdiagnosis, and will tell the pregnant woman to follow up dynamically. Therefore, the chance of misdiagnosis of clubfoot is very small.