Jb. Ubbink, IS AN ELEVATED CIRCULATING MATERNAL HOMOCYSTEINE CONCENTRATION A RISKFACTOR FOR NEURAL-TUBE DEFECTS, Nutrition reviews, 53(6), 1995, pp. 173-175
The mechanism by which folic acid supplementation reduces neural tube
defect (NTD) incidence is unknown. Recent evidence suggests that mothe
rs with NTD neonates have higher circulating homocysteine concentratio
ns compared with controls. This presumably indicates impaired homocyst
eine remethylation, resulting in a possible methionine shortage at a c
rucial stage of fetal development.