A nurse is caring for a client who is in active labor and notes late decelerations in the FHR. Which of the following actions should the nurse take first?

A. Apply a fetal scalp electrode: A fetal scalp electrode provides more accurate fetal heart rate monitoring if external monitoring is inadequate. However, it is invasive and not priority when addressing signs of fetal distress like late decelerations, which require immediate intrauterine resuscitation measures. B. Increase the rate of the IV infusion: Increasing IV fluids can improve uteroplacental perfusion by correcting maternal hypotension or increasing circulating volume. However, it is not the immediate intervention; repositioning the client often relieves cord compression or improves placental blood flow more quickly. C. Administer oxygen at 10 L/min via a nonrebreather mask: Administering oxygen can increase the oxygen available to the fetus, helping to resolve fetal hypoxia. However, it is implemented after or simultaneously with repositioning the client, as the change in position can immediately alleviate compression. D. Change the client's position: Repositioning the client, typically to the left lateral side, helps alleviate compression of the inferior vena cava and improve uteroplacental blood flow. It is the first-line response to late decelerations because it is noninvasive, quickly implemented, and can immediately enhance fetal oxygenation.