Rhesus (Rh) factor - QS Study
QS Study


It is one of the blood group system based on the presence or absence of Rhesus (Rh) antigen in the Red Blood Cell membrane. In Rhesus (Rh) system, spontaneous antibodies never occur. The Rh factor is a protein that can be found on the surface of red blood cells. If your blood cells have this protein, you are Rh positive. If your blood cells do not have this protein, you are Rh negative. Having an Rh-negative blood type is not an illness and usually does not affect your health.

Rh factor – It is inherited, meaning it is passed from parent to child through genes. The Rh factor test is done during pregnancy to identify a woman’s Rh factor. In some cases, the baby’s father might need an Rh factor test, too.

There is six Common type of Rh antigens (C, D, E & c.d.e) Each of them is called Rh factor.

Types: D is the most common and more antigenic than others.

Persons having D Ag = Rh

Persons having No Ag = Rh – Ve.

Rh typing is important during abortion, miscarriage, pregnancy, and birth, as mother and fetus may not be Rh-compatible.