A human blood group system with five main antigens, C, c, D, E, and e with the D antigen (rhesus factor, Rh) being the most important. Rhesus-positive (Rh+) cells have the D antigen, rhesus-negative cells (Rh−) do not. Rh+ fetal cells can cross the placenta and sensitize a Rh− mother; maternal anti-D antibody can then cause haemolytic disease of the newborn (erythroblastosis fetalis) in a subsequent pregnancy if the fetus is Rh+.
http://www.ncbi.nlm.nih.gov/projects/gv/mhc/xslcgi.cgi?cmd=bgmut/home The Blood Group Antigen Gene Mutation database.
Subjects: Medicine and Health.