Blood Groups are divided into several different types such as A negative, B positive, AB positive or negative, O positive and so on. All these different blood types have red blood cells (RBCs), which help to transport oxygen around the body. Everyone’s RBCs contain different groups of proteins which are inherited from our parents either outside or inside the cell itself. It is these elements in our Red Blood Cells that act like a thumb print making our blood different from any body else’s. Rh factor, are groups of proteins which are found only on the surface of the red blood cell. If you fall in this category your blood will be classified as Rh positive. However, if Rh factor is absent from your blood then it is classified as Rh negative.