Authors' conclusions: Taking any vitamin supplements prior to pregnancy or in early pregnancy does not prevent women experiencing miscarriage.

How much folic acid do I need to prevent miscarriage?

Women who get at least 400 micrograms of the vitamin from their diets during the first few weeks of pregnancy can reduce their unborn baby's risk of neural tube defects (NTDs) by as much as 70%.

Is folic acid 5mg good for early pregnancy?

While most pregnant women would benefit from daily folic acid doses of 0.4 mg through diet, or folic acid doses of 0.8 to 0.9 mg/d as found in most prenatal vitamins, selected groups of women at high risk might benefit from daily folic acid doses of 5 mg starting from 2 months before conception up to the end of the ...