Final answer:
The nurse should schedule serial ultrasound examinations to monitor the fetus during pregnancy to detect the possible development of fetal hydrops caused by Rh incompatibility.
Step-by-step explanation:
The correct answer is A) Rh incompatibility. The nurse should schedule serial ultrasound examinations to monitor the fetus during pregnancy to detect the possible development of fetal hydrops caused by Rh incompatibility. Rh factor incompatibility between the mother (Rh-) and the fetus (Rh+) can result in a type II hypersensitivity hemolytic reaction known as hemolytic disease of the newborn (HDN). Serial ultrasound examinations can help monitor the fetus for signs of hydrops, which is characterized by excessive fluid accumulation in the body cavities.