Ay normal lang yan, ate! 16 weeks ka pa lang kaya folic acid pa ang focus nila, super important para sa baby's development, lalo na ngayon sa early to mid pregnancy. A few of my mum friends naman natanggap din lang folic acid lang sa simula, tapos dinagdagan ng ibang vitamins like iron at calcium as pregnancy progresses, kaya most likely mag-add pa ng more supplements soon based sa blood work mo. Best to ask your OB kung kailan sila magdadagdag ng iba, pero for now folic acid is really doing good work for baby's brain and spinal cord development!