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  1. Folic Acid and Pregnancy: How Much Do You Need? - Healthline

  2. Folic acid for pregnancy: Sources, dosage, and uses - Medical News Today

  3. How and when to take folic acid - NHS

  4. Folic Acid | the American Pregnancy Association

  5. Folic Acid: Facts for Clinicians | Folic Acid | CDC

  6. Folic Acid Benefits in Pregnancy - WebMD

  7. Folate (folic acid) - Mayo Clinic

  8. Folic acid - medicines in pregnancy

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