What intervention is appropriate for a client experiencing late decelerations in fetal heart rate during labor?

Administering oxygen is an appropriate intervention for a client experiencing late decelerations in fetal heart rate during labor. Late decelerations are indicative of uteroplacental insufficiency, meaning that the fetus may not be receiving adequate oxygen or nutrients due to compromised blood flow to the placenta. By providing supplemental oxygen to the mother, it can help improve fetal oxygenation and alleviate stress on the fetus.

The other options do not effectively address the underlying issue of late decelerations. Encouraging maternal ambulation might not be suitable, as movement can sometimes exacerbate the situation rather than help it. Placing the client in a supine position is not advisable, as this position can reduce venous return and further compromise uteroplacental blood flow, worsening the fetal condition. While preparing for immediate delivery may be necessary if the fetus shows signs of distress or if the situation doesn't improve, it is not the initial response to late decelerations. Administering oxygen is a more immediate and appropriate response to address the potential oxygen deprivation the fetus may be experiencing.