Abstract

Ductus venosus connects the intra-abdominal umbilical vein to inferior vena cava. Absence of ductus venosus may exist with cardiac, extracardiac, or chromosomal abnormalities. Connection site of umblical is important in the absence of ductus venosus. Diagnosis of absence of ductus venosus can be made by colour Doppler ultrasound in fetus. We also peresented a case which umbilical vein joined portal sinus in the absence of ductus venosus.