Question

What is the Rh factor?

Answer 1

1. Rh is the most complex of the blood group system.
2. Rh – factor is an antigenic protein present on the surface of the red blood cells in human beings.
3. It was first discovered by Landsteiner and Wiener (1940), on the surface of RBCs of Rhesus monkeys, so it is called the Rh factor/ Rhesus factor (also called D antigen).
4. The person having Rh factor (D antigen) is called Rh-positive (Rh +ve) and those lacking D antigens are called Rh negative (Rh -ve).