Final answer:
When a baby shows variable decelerations on a fetal heart rate (FHR) monitor, the correct course of action is to monitor the fetal heart rate closely without intervening, while also addressing the potential causes of the variable decelerations.
Step-by-step explanation:
When a baby shows variable decelerations on a fetal heart rate (FHR) monitor, it indicates a potential problem with the baby's oxygen supply during contractions. Variable decelerations are caused by the compression of the umbilical cord, which temporarily reduces blood flow to the baby. In this situation, the correct course of action is to monitor the fetal heart rate closely without intervening, while also addressing the potential causes of the variable decelerations. This may include changing the maternal position to relieve pressure on the umbilical cord or considering an emergency cesarean section if deemed necessary.