1. When should a woman start taking a prenatal multivitamin? A woman should start taking a prenatal multivitamin at least 12 weeks prior to conception - when she is trying to conceive or planning a pregnancy.
You don't need to buy Materna. Just buy the prenatal/postnatal vitamin from Costco, the Kirkland brand has exact ingredients as Materna and costs about 1/3 of the price.