Gynaecology & Obstetrics Folic acid required in first trimester of pregnancy in a woman with a history of NTD is: A 100 microgram B 400 microgram C 4 mg D 5 mg 💡 Explanation Folic acid required in first trimester of pregnancy in a woman with a history of NTD is: ✓ Correct Answer: C. 4 mg