<prompt> Minimum amount of folic acid supplementation a woman should take preconceptionally is10 micrograms40 micrograms100 micrograms400 micrograms  <response>: The incidence of neural-tube defects NTDs is 0.9 per 1000 live bihs, and they are second only to cardiac anomalies as the most frequent structural fetal malformationIt is currently recommended, that all women who may become pregnant take daily 400mg of folic acid orally before conception and through the first trimesterReference: Williams obstetrics; 25th edition; Chapter 8; Preconceptional care 