Which prevention measure is most effective at reducing neural tube defects in newborns?

Which prevention measure is most effective at reducing neural tube defects in newborns?

• A. Vitamin C supplementation
• B. Folic acid supplementation
• C. Calcium supplementation
• D. Vitamin B12 only in infancy

Answer: (B)

Folate availability during early fetal development is crucial for the proper closure of the neural tube. The neural tube forms very early in pregnancy, often before a woman knows she is pregnant, so sufficient folate (folic acid) before conception and in the first weeks of gestation supports the rapid cell division and DNA synthesis needed for neural tube closure. Supplementation with folic acid has been shown in population studies and guidelines to substantially reduce the risk of neural tube defects such as spina bifida and anencephaly. That’s why folic acid supplementation is the most effective preventive measure. In contrast, vitamin C and calcium do not have a demonstrated effect on neural tube closure, and while vitamin B12 is important for folate metabolism, supplementing only in infancy would not prevent neural tube defects that occur early in pregnancy. For practical prevention, a daily folic acid intake of about 400 micrograms for women of childbearing potential is recommended, with higher doses (around 4 milligrams daily) in those at high risk (for example, with a prior NTD-affected pregnancy), starting before conception and continuing through the first trimester. Eating folate-rich foods and consuming fortified grains also help increase intake.

Folate availability during early fetal development is crucial for the proper closure of the neural tube. The neural tube forms very early in pregnancy, often before a woman knows she is pregnant, so sufficient folate (folic acid) before conception and in the first weeks of gestation supports the rapid cell division and DNA synthesis needed for neural tube closure. Supplementation with folic acid has been shown in population studies and guidelines to substantially reduce the risk of neural tube defects such as spina bifida and anencephaly. That’s why folic acid supplementation is the most effective preventive measure.

In contrast, vitamin C and calcium do not have a demonstrated effect on neural tube closure, and while vitamin B12 is important for folate metabolism, supplementing only in infancy would not prevent neural tube defects that occur early in pregnancy. For practical prevention, a daily folic acid intake of about 400 micrograms for women of childbearing potential is recommended, with higher doses (around 4 milligrams daily) in those at high risk (for example, with a prior NTD-affected pregnancy), starting before conception and continuing through the first trimester. Eating folate-rich foods and consuming fortified grains also help increase intake.