Biophysical Profile

The biophysical profile is a combination of tests, including an ultrasound evaluation and a non-stress test (NST), designed to determine fetal health during the third trimester. This test may be performed if there is a question about the fetal health of your baby resulting from either an examination, maternal/fetal symptoms, or because of the high-risk nature of your pregnancy.

The ultrasound portion of the test, which may take up to an hour, is like any other obstetrical ultrasound performed during pregnancy. The NST involves attaching a belt to your abdomen to measure fetal heart rate and another belt to measure contractions over a 20- to 30-minute period.