<prompt> In a lady with history of bih of a previous child with neural tube defect, amount of folic acid to be given in microgram as secondary prophylaxis before next conception is:40 microgm400 microgm4000 microgm500 microgm  <response>: To prevent NTDs, it is recommended that all women of child-bearing age, who are capable of becoming pregnant should take 0.4 mg 400 mg of folic acid daily. If a pregnancy is planned in high risk women with previously affected child, supplementation should be staed with 4 mg 4000 mg of folic acid daily, beginning 1 month before the time of the planned conception. 