Hi mama! Yan talaga ang confusing part ng prenatal vitamins, sobrang dami ng dapat inumin! But honestly, yan ang best tanungin ng OB mo directly kasi siya ang nakakita ng full picture ng health mo at ano talaga ang kailangan mo combination-wise. A few of us moms, nag-consult lang talaga with our doctors kung puwedeng i-take together or kung kailangan ng spacing dahil different vitamins interact differently, hindi one-size-fits-all talaga! Pero generally, most of us take calcium and our prenatal vitamins pero often spaced out, kaya better safe than sorry, ask mo na lang sa OB mo next visit para sure