Biliary atresia is primarily an occlusive disease of the bile ducts, which is common in infants and is not easily detected during pregnancy. If the fetus has biliary atresia during pregnancy, the diagnosis is not clear through examination because the fetus is in the mother’s body at this time, and it is easy to misdiagnose it because it is not possible to see the fetus completely through imaging and to accurately determine the development of the embryo. If you want to know whether there is biliary atresia, it is generally recommended to determine it through physical examination, because jaundice may appear when biliary atresia occurs, which is mainly indicated by yellowish skin color and yellowish sclera; if similar abnormalities are found, then diagnosis and analysis can be carried out through imaging examination, such as ultrasound examination, magnetic resonance examination, radionuclide liver and gallbladder dynamics phenomenon examination, and so on. Biliary atresia should be treated with surgery as soon as it is diagnosed, otherwise there is a risk of death within two years.