Which supplement is commonly recommended during pregnancy to prevent neural tube defects?

Folic acid is a critical supplement recommended during pregnancy to help prevent neural tube defects, which are serious birth defects of the spinal cord and brain. Adequate levels of folate (the natural form of B9 found in food) are essential for cell division and the proper closure of the neural tube during the early stages of fetal development, specifically within the first month after conception.

Research indicates that women who receive appropriate amounts of folic acid before conception and during early pregnancy can significantly reduce the risk of neural tube defects, such as spina bifida and anencephaly. The recommended daily intake for pregnant women is typically 400 to 800 micrograms of folic acid, which is often advised even before conception, as many pregnancies are unplanned and early development is crucial.

Calcium and iron, while important for maternal health during pregnancy, do not specifically target neural tube defect prevention. Vitamin D also plays a vital role in overall maternal and fetal health but does not have a direct effect on preventing these neural tube defects. Thus, the emphasis on folic acid conveys its unique and essential role in this aspect of prenatal care.