Do you know your blood-type? Every human on this planet has either blood type O, A, B, or AB, and within these types, you either have RH positive or RH negative blood. The Rhesus (Rh) factor refers to a specific antigen in the blood. If your blood lacks the Rh antigen, you are Rh-negative.
If your blood has the antigen, you are Rh positive. About 85% of the population has the antigen. 15% does not, and are considered ‘Rh- Negatives’
RH Negative blood types are one of the most fascinating subjects I’ve ever researched.