Rh factor is an antigen present on the red blood cells. This antigen was first discovered in Rhesus monkey. The persons having Rh factor are called Rh positive (Rh+). And the persons not having Rh factor are called Rh negative (Rh-). About 85% humans are Rh positive. An Rh negative mother may lose her baby if the mother has Rh positive baby.
Test Your Understanding and Answer These Questions:
- What do you mean by Rh factor?