Knowing your Blood Group & Rh Type is one of the most fundamental and critical pieces of your health information. This test identifies your specific blood type (A, B, AB, or O) and your Rh factor (Positive or Negative). This knowledge is absolutely essential for safe blood transfusions and is a vital component of prenatal care for expectant mothers. A simple blood draw is all it takes. This isn't just a test—it's a core piece of your medical identity that everyone in your family should have on record.