A nurse is contributing to the plan of care for a client who is pregnant and reports having trouble sleeping. Which of the following instructions should the nurse include in the plan of care?

A. "Soak in a bathtub of hot water each night.": While warm baths can be relaxing, hot water should be avoided during pregnancy due to the risk of maternal hyperthermia, which can harm the fetus. Safety precautions must be emphasized. B. "Use a transcutaneous electrical nerve stimulator": TENS units are generally used for pain management, not for improving sleep, and their safety during pregnancy for sleep promotion is not well established. C. "Lie on your left side with your top leg forward.": Side-lying, particularly on the left side, improves maternal comfort, reduces pressure on the vena cava, and can promote better sleep during pregnancy. Using a pillow between the legs can enhance support and relaxation. D. "Obtain a prescription for pramipexole": Pramipexole is a dopamine agonist used for restless leg syndrome or Parkinson’s disease, but it is not routinely prescribed for sleep disturbances in pregnancy due to potential fetal risks.