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Folic acid, the synthetic form of vitamin B9, also known as folate that helps prevent neural tube defects (NTDs) – serious birth defects of the spinal cord (such as spina bifida) and the brain (such as anencephaly).  Ferrous sulfate is a mineral that supplies iron to your body, which is needed to help your blood carry oxygen to your organs. Please refer here mommy regarding folic & ferrous intake https://www.who.int/elena/titles/guidance_summaries/daily_iron_pregnancy/en/