The nurse is teaching a primigravida at 10-weeks gestation about the need to increase her intake of folic acid. Which explanation should the nurse provide that supports preventative perinatal care?

• A. The risk for neonatal cerebral palsy increases with folic acid deficiencies during pregnancy.
• B. Folic acid can significantly reduce the incidence of mental retardation.
• C. Adequate folic acid during embryogenesis reduces the incidence of neural tube defects.
• D. The incidence of congenital heart defects is related to folic acid intake deficiencies.

Answer: (C)

Folic acid is essential during embryogenesis for neural tube formation. The neural tube, which becomes the brain and spinal cord, closes very early in gestation—usually by about the end of the first month. Adequate folate availability during that critical window significantly reduces the risk of neural tube defects such as spina bifida and anencephaly. Because these defects occur so early, preventative perinatal care emphasizes starting folic acid before conception or as soon as pregnancy is recognized and maintaining it through the first trimester. While folate supports overall fetal development, the most well-established preventive effect is the reduction of neural tube defects, which is why this statement is the best choice. Other associations like cerebral palsy, mental retardation, or heart defects are not as directly linked to folate deficiency.