Final answer:
A reactive non stress test evaluates the health of the fetus during pregnancy by assessing five criteria. High scores indicate a healthy fetus.
Step-by-step explanation:
A reactive non stress test is a test performed during pregnancy to evaluate the health of the fetus. It assesses five criteria: skin color, heart rate, reflex, muscle tone, and respiration.
Each criterion is assigned a score of 0, 1, or 2, and the scores are added together. A high score indicates a healthy fetus, while a lower score may indicate that the baby is in distress.