What indicates a "reactive" biophysical profile?

A "reactive" biophysical profile is indicative of a well-functioning placenta and a healthy fetus. The criteria for this determination include the presence of at least two fetal heart rate accelerations within a specific timeframe, typically over a 20-minute to 30-minute period, with the accelerations meeting defined parameters such as increases in heart rate that are appropriate for the gestational age of the fetus.

This assessment reflects the fetus's ability to respond appropriately to stimuli, which is a sign of an active and healthy fetus. Therefore, observing at least two accelerations that meet the normal criteria is a reassuring sign and is what classifies the biophysical profile as "reactive."

In contrast, the other scenarios presented do not indicate a healthy or reactive profile, as they either lack the necessary accelerations or present abnormal heart rate patterns. Understanding these distinctions is crucial for evaluating fetal well-being and making clinical decisions during monitoring.