Abstract: Abstract: Objective To investigate the clinical significance of prenatal ultrasound examination in the diagnosis of fe⁃ tal digestive tract development. Methods Twenty-nine cases of congenital digestive tract malformation were examined in according to the different characteristics of their different fetal ultrasound images. Results There were 11 cases with non- magenblase or less magenblase (37.93%), 4 cases with combination of multiple malformations, and 9 cases with combination of amniotic fluid in the 29 cases. There were 7 cases (24.14%) with dilatation of intestine and intestinal vesicles, in which 3 with multiple malformations and 3 with polyhydramnios. There were 8 cases (27.58%) with double bubbles, in which 1 case with multiple malformations and 7 cases with amniotic fluid. Conclusion The prenatal ultrasound examination in 30 to 32 weeks of pregnancy is very valuable in diagnosis of fetal digestive tract development, which is worthy of clinical application.

Key words: ultrasonography, doppler, color, fetus, ultrasonography, prenatal, digestive system abnormalities, diagnosis, differential