Hindi po, lahat ng tao may blood type, kabilang ang magulang mo, kahit hindi mo alam o na-discover lang late sa buhay nila! Sometimes parents don't find out their blood type until they need a transfusion or checkup, lalo na kung dating hindi common ang blood testing dito, pero nandoon na talaga siya. A few of my mum friends actually discovered their own blood type lang when they got pregnant dahil required sa prenatal, so it's more about not knowing rather than wala talaga, basta magpakonsulta sa doctor if kailangan mo malaman para sa medical records mo or of your kids.