What is your blood type? Donate and find out. If the baby's Rh factor is positive, like his or her father's, this can be an issue if the baby's red blood cells cross to the Rh negative mother. HDN happens most often when an Rh negative mother has a baby with an Rh positive father. Nearly 16 million blood components are transfused each year in the U.S." There can be a problem if a mother and baby have a different blood type and Rh factor. For more about plasma donation, visit the plasma donation facts. The universal plasma donor has Type AB blood. The universal red cell donor has Type O negative blood. The need for O+ is high because it is the most frequently occurring blood type (37% of the population). However, the need for O negative blood is the highest because it is used most often during emergencies. Only 7% of the population are O negative. It isn’t an illness and doesn’t affect your health. If you are Rh-negative, it doesn’t mean there’s a problem. Rh-positive is more common than Rh-negative. If it doesn’t have the protein, you’re Rh negative. If your blood has the protein, you’re considered Rh positive. Types O negative and O positive are in high demand. It’s genetic, so it’s passed down by mother and father. Minority and diverse populations, therefore, play a critical role in meeting the constant need for blood. Type O is routinely in short supply and in high demand by hospitals – both because it is the most common blood type and because type O negative blood is the universal blood type needed for emergency transfusions and for immune deficient infants.Īpproximately 45 percent of Caucasians are type O (positive or negative), but 51 percent of African-Americans and 57 percent of Hispanics are type O. Why? O negative blood can be used in transfusions for any blood type. Whether or not you have the Rh factor is usually only a concern during pregnancy. If you have the Rh factor, you are considered Rh positive (+), and if you don’t, you’re considered Rh negative (-). This is where the + and - signs next to your blood type come into play. Universal donors are those with an O negative blood type. The Rh factor is also a substance on the red blood cells.
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