The Rh factor is part of your blood type. In addition to being A, B, AB and O, blood can be Rh positive or Rh negative. It is important to know your blood type so you can receive the correct blood type for a transfusion and during pregnancy.
Scientists Karl Landsteiner and A. S. Weiner identified the Rh factor in 1940 which connected human blood with that of the rhesus monkey.
Positive vs. Negative
The Rh factor is determined by the antigens present in your blood. Rh positive blood has antigens present, while Rh negative blood does not.
Rare Blood Type
The Rh negative blood type is extremely rare. According to The Red Thread, only 16.6% of the population worldwide has Rh negative blood.
An Rh negative pregnant woman's immune system may make antibodies against Rh positive blood cells, including those of her unborn baby. This condition is called Rh sensitization. The Rh positive fetus that has been attacked by the mother's immune system can become anemic, suffer congestive heart failure or even die. .
According to Lisa Shea, genetics play a role in determining Rh factor. The only way a child can be Rh negative is if both parents are also Rh negative, because the negative factor is recessive.
About O Positive Blood
Blood that is type O positive has two main characteristics: an absence of blood antigens A or B and a positive Rhesus...
Is O Positive Blood Rare?
A person's blood type is determined by the antigens in his blood, chemical substances that the immune system might react to if...
What Is Sero-Negative Rheumatoid Arthritis?
Diagnosing rheumatoid arthritis involves a series of lab tests and a physical evaluation of symptoms. Testing blood for rheumatoid factor is a...
Strange Facts About RH Negative Blood
Rhesus (Rh) factor is an inherited protein on your red blood cells. If the protein if present on your red blood cells,...
Is B-Positive a Rare Blood Type?
Blood is separated into types using certain red blood cell characteristics. There are eight blood types; some are rarer than others.
Difference Between O Positive & O Negative Blood
Blood is typed according to the antigens, or factors that promote an immune response, on the red blood cells. Matching the blood...
Diet for Blood Type O Negative
Dr. Peter J. D'Adamo, a naturopathic doctor, recommends that people eat according to their blood type and know what type of lectins,...
RH Negative Health Problems
The Rhesus, or Rh factor, is a protein that's present on the red blood cells of about 85 percent of all people....