Final answer:
FHR late decelerations can be caused by various factors such as uteroplacental insufficiency, umbilical cord compression, maternal hypotension, and fetal head compression. The appropriate nursing treatments would be administering oxygen, changing maternal position, administering IV fluids, and preparing for vacuum extraction, respectively.
Step-by-step explanation:
FHR late decelerations can be caused by uteroplacental insufficiency, which refers to insufficient oxygenated blood supply from the placenta to the fetus. This can be treated by administering oxygen to the mother. Umbilical cord compression, which occurs when the umbilical cord is compressed, can also cause late decelerations. Changing the maternal position can help relieve the compression. Maternal hypotension is another cause of late decelerations, and it can be managed by administering IV fluids to increase blood pressure. Finally, fetal head compression can also lead to late decelerations. In this case, preparing for vacuum extraction may be necessary.