Fetal gallbladder not shown at 30 weeks of pregnancy is considered to be caused by physiological reasons, or congenital gallbladder dysplasia, chromosomal abnormality, etc. It is generally recommended to follow up according to different situations, or to further do fetal chromosomal examination. Fetal gallbladder at 30 weeks of pregnancy does not show up, which usually means that the ultrasonographer did not detect the fetal gallbladder, it does not mean that the fetus does not have a gallbladder, partly because of the limitations of ultrasonography, and partly due to the contraction of the fetal gallbladder in the late stage of the fetus, it can not be visualized under the ultrasound. If the gallbladder has been examined previously and the results of other tests are good, there is usually no need to worry and the test can be repeated at 2 to 3 weeks. In some cases where the fetal gallbladder has not been visualized on ultrasound, there may be gallbladder agenesis, small gallbladder, or biliary atresia. If the ultrasound still indicates that the gallbladder has not been visualized, then fetal nuclear and chromosomal tests are recommended. Some fetuses with normal chromosomes can be followed up until after birth for further ultrasound of the liver, gallbladder and spleen as well as liver function tests. Most of the 30-week-old fetuses with undisplayed gallbladder have a good outcome, while some of them need further chromosomal and other related tests to rule out congenital dysplasia. It is recommended to take into account your own situation and follow the doctor’s advice to have regular obstetric checkups.