Rhesus factor also known as Rh factor is described as an antigen that is present on the surface of red blood cells in most individuals. Individual who possess the Rh positive blood type e.g A positive, O positive, AB positive, are said to be rhesus positive while those with negative symbol are said to be rhesus negative. Rhesus factor is inherited from parents, usually the father. If you are rhesus positive (RhD positive), this implies that the protein (D antigen) is present on the surface of your red blood cells, however, if you lack the D antigen, you will be rhesus negative (RhD negative). Over 75% of humans are rhesus positive. Having Rh negative blood type does not make you unhealthy, apparently, it doesn't affect your health. Rhesus status only become an issue of concern when a woman whose rhesus status is negative get pregnant and the baby she's carrying is rhesus positive, this is known as Rhesus Incompatibility. Commonly, a child inherits the father'