Antenatal diagnosis of twin transfusion syndrome by ultrasound.

The evaluation of 2 cases of twin transfusion syndrome by conventional and real-time B-scan ultrasound is described. The importance of differentiating this syndrome from the isolated growth failure of 1 fetus in a twin pregnancy with a normally developing second fetus is emphasized. Assessment of placentation, fetal size and activity, as well as amount of fluid by diagnostic ultrasound is an important aid in the management of multiple gestation.