A–Z Glossary

Fetal tone

Fetal flexion and extension activity, such as opening a hand or extending and flexing a limb, observed during ultrasound.

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Non-stress test (NST) and biophysical profile (BPP)

Non-stress test (NST) and biophysical profile (BPP)

What is a non-stress test? A non-stress test, or NST, is a fetal monitoring test that records the fetal heart rate over time, usually along with uterine activity. It is called “non-stress” because it does not intentionally stress the fetus or trigger contractions. Instead, it observes the fetal heart rate pattern under usual conditions. The […]