What does a non-reactive NST imply?

A non-reactive non-stress test (NST) implies that there is a lack of an appropriate increase in fetal heart rate in response to fetal movement within a specified period. This lack of reactivity can raise concerns about the well-being of the fetus, as it may suggest that the fetus is experiencing distress or compromise. Fetal heart rate reactivity is considered an indicator of a healthy fetus; therefore, when this is absent, it serves as a caution signal that further assessment is needed to determine the cause of the non-reactivity.

Typically, a non-reactive NST prompts further diagnostic evaluation, which may include additional monitoring or testing to investigate potential factors affecting the fetal heart rate, ultimately ensuring the safety and health of both the fetus and the mother.