Dose of folic acid for women at increased risk of Neural tube defects preconceptionally is
Most women at increased risk for NTDs benefit from 4 mg folic acid taken daily before conception and through the first trimester. This is paicularly impoant if a woman has one or more prior affected children or if either the pregnant woman or her paner has such a defect. Folic acid supplementation may not decrease the risk for NTDs in those with valproic acid exposure, pregestational diabetes, first-trimester fever or hot tub exposure, or defects associated with a genetic syndrome (Ref: William's Obstetrics; 25th edition)
4ng
4mcg
4mg
4g
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