Tocolysis with terbutaline sulfate in patients with placenta previa complicated by premature labor.

Six patients with placenta previa complicated by premature labor underwent tocolysis with terbutaline sulfate. The average prolongation of pregnancy was 3.5 weeks. Five patients were at 31 weeks' gestation or more at the initiation of tocolytic therapy and had infants who survived and were greater than 2,000 gm at birth. All patients received an average blood transfusion of 6.7 units of packed cells each.