For the exception of taking folic acid and vitamin D, multivitamins taken during pregnancy do not boost the health of mothers or babies. And surprisingly, too much vitamin A can cause harm to the baby.
Researchers made these statements in Drug and Therapeutics Bulletin, saying they looked at all evidence. A balanced diet of fresh fruits and vegetables is recommended along with folic acid and vitamin D supplementation.
They recommend women resist the marketing claims that taking multivitamins will give their baby a better start in life.