In addition to the regular pregnancy diet and prenatal vitamins and minerals, which supplements would the nurse educate the pregnant client with a history of ventricular septal defect repair to take?

Choice A rationale Vitamin B12 is essential for nerve function and the production of red blood cells, but it is not specifically indicated as an additional supplement for a patient solely based on a history of ventricular septal defect (VSD) repair. Most pregnant women receive adequate B12 through standard prenatal vitamins or diet. Unless the patient follows a strict vegan diet or has a malabsorption issue, B12 supplementation is not the primary focus for managing the hematological demands of pregnancy. Choice B rationale Iron supplementation is critical for a pregnant client with a history of ventricular septal defect repair. Pregnancy naturally increases blood volume, and a history of cardiac repair requires optimal oxygen-carrying capacity to prevent strain on the heart. Iron is a key component of hemoglobin, which carries oxygen to tissues. Maintaining a normal hemoglobin level (12 to 16 g/dL) prevents anemia, which could otherwise lead to increased cardiac output and potential heart failure in a patient with a pre-existing cardiac history. Choice C rationale Vitamin C is important for collagen synthesis and helps with the absorption of iron, but it is not typically prescribed as a standalone additional supplement for cardiac patients in pregnancy. While it is beneficial, the standard amount found in prenatal vitamins is usually sufficient. The priority for a patient with a repaired VSD is ensuring the blood can carry enough oxygen, which is more directly addressed by iron levels rather than the antioxidant properties of Vitamin C. Choice D rationale Calcium is vital for fetal bone development and maternal bone health, but it does not have a specific therapeutic benefit related to the history of a ventricular septal defect repair. While all pregnant women need adequate calcium intake to prevent maternal bone demineralization, it does not directly impact the hemodynamic stability or the oxygenation needs of a patient with a cardiac history in the same way that iron supplementation does during the high-demand state of pregnancy.