Hindi ako personally tried Calvit, but honestly yan ang tanong na dapat i-check talaga with your OB kasi different vitamins may different formulations and ingredients, lalo na pag buntis ka na. A few of my mum friends lang nag-take ng prescribed prenatal vitamins from their doctors rather than over-the-counter ones para sure na safe talaga for baby, kaya better to ask your OB directly about Calvit specifically, they'll know what's best for your pregnancy!