Here's three main ways to type your blood: One of the easiest and most effective ways to determine your blood type is to have your doctor perform a test. A professional will draw blood and then ...

Having the protein means RH positivity. But if you don't have the protein, you're RH negative. You don't necessarily have to ...

because she is Rh-negative. Initial prenatal laboratory values drawn at the first prenatal visit for this pregnancy revealed her blood as type A, RhD-negative, with a negative antibody screen.