What defines a reactive NST for a fetus at 32 weeks gestation?

A reactive non-stress test (NST) is characterized by specific criteria that indicate the well-being of the fetus. For a fetus at 32 weeks gestation, a reactive NST is defined as having at least two accelerations of the fetal heart rate in a 20-minute period, with each acceleration being an increase of at least 15 beats per minute (bpm) above the baseline for at least 15 seconds.

The choice indicating an increase of at least 15 bpm for 15 seconds aligns perfectly with these criteria, which is why it is considered the correct answer. This standard reflects the fetus's ability to respond to stimuli, which is an important indicator of fetal health and well-being.

Other options present variations in the parameters of heart rate accelerations. While they may reflect fetal heart rate patterns, they do not meet the accepted definition for a reactive NST at this gestational age. Understanding these criteria is crucial for monitoring fetal health effectively and ensuring appropriate interventions when needed.