Sonographic biophysical profile in the postdate pregnancy.

One hundred thirty-one postdate pregnancies were evaluated by the sonographic biophysical profile. Results of prenatal testing were compared to neonatal condition. Predictive values were calculated in order to determine whether this testing scheme could be used to detect the fetus at risk for neonatal distress. The results of this study show that a normal biophysical profile score is highly predictive of normal outcome, but an abnormal test has only a 14% predictive value of poor neonatal outcome.