Which description best fits a reactive non-stress test (NST)?

A reactive non-stress test (NST) is characterized by a normal baseline fetal heart rate and signs of adequate fetal well-being, typically demonstrated through the presence of accelerations in the fetal heart rate that indicate a healthy response to fetal movement. When a test is reactive, it means that the fetal heart rate shows at least two accelerations of 15 beats per minute or more above the baseline, lasting for at least 15 seconds within a 20-minute period, along with a normal baseline heart rate with moderate variability.

The description that aligns best with a reactive NST includes a normal baseline heart rate, which indicates that the fetus is stable, accompanied by moderate variability in the heart rate that reflects a healthy interaction between the fetal central nervous system and cardiovascular system. This overall pattern promotes reassurance regarding fetal well-being and decreases the likelihood of hypoxia or other complications.

In contrast, other descriptors provided either do not meet the criteria for reactivity or suggest abnormal findings that would indicate further evaluation may be needed. Such details help in establishing a clear understanding of fetal health, which is the primary aim of conducting a non-stress test.