A nurse is reviewing the results of a nonstress test for a client who is at 37 weeks of gestation. Which of the following findings indicates a reactive nonstress test?

Choice A rationale Fetal heart rate (FHR) accelerations occurring with fetal movement signify a healthy autonomic nervous system and adequate fetal oxygenation. These accelerations, typically 15 beats per minute (bpm) above baseline for 15 seconds in a fetus beyond 32 weeks, indicate a reactive nonstress test, reflecting good fetal well-being. Choice B rationale Late decelerations are a concerning finding, indicating uteroplacental insufficiency and potential fetal hypoxia. They are characterized by a gradual decrease in FHR that begins after the peak of the contraction and returns to baseline after the contraction ends, signifying a non-reassuring fetal status. Choice C rationale Variable decelerations are abrupt decreases in FHR, often indicative of umbilical cord compression. While not always pathological, frequent or severe variable decelerations can compromise fetal oxygenation and require further assessment, thus not indicating a reactive nonstress test. Choice D rationale Minimal variability in FHR, defined as an amplitude range of 5 bpm or less, suggests a compromised fetal central nervous system or a sleeping state. Persistent minimal variability can be a sign of fetal hypoxia or acidosis, and it does not meet the criteria for a reactive nonstress test. Normal variability is 6-25 bpm.