Question

What is RH in blood ?

Answer 1

Clinically, it is the most important blood group system after ABO. At present, the Rh blood group system consists of 50 defined blood-group antigens, among which the five antigens D, P, c, E, and e are the most important. The commonly used terms Rh factor, Rh positive and Rh negative refer to the D antigen only. Besides its role in blood transfusion, the Rh blood group system—specifically, the D antigen—is used to determine the risk of hemolytic disease of the newborn (or erythroblastosis fetalis) as prevention is key.

http://en.wikipedia.org/wiki/Rh_blood_group_system

Answer 2

"Rh" stands for RHESUS FACTOR.

It's an antigen that SOME people have, on their red blood cells.

(An antigen is a substance that causes our bodies to form antibodies.
But that's not so important right now.)

The MAIN IDEA is...
that people who DO have the rhesus factor, in their blood, will have a POSITIVE blood type.

People who DON'T have the rhesus factor in their blood will have a NEGATIVE blood type.

~~~~~~~~~

You know about the four different blood types, right?

A, B, AB, and O.

Well, in addition to that,
our blood type can either be POSITIVE or NEGATIVE.
Like someone with A+ (positive) blood type,
or someone with A- (negative) blood type.

Whether our blood is positive or negative
depends on whether or not we have the RHESUS FACTOR.

Answer 3

thanks