Do you have friends who are rh negative but new to it all?Here is a brief introduction to let them know what we are all about: Being rh negative means testing negative for the rhesus gene (D). The term rhesus derives from the rhesus monkey carrying the gene. The rhesus factor was discovered by Karl Landsteiner in 1937, 37 years after he has discovered the major ABO blood groups. Women who are rh negative, already carry antibodies and are pregnant with an rh positive fetus, need an Anti-D shot or the fetus will likeliest die. Rh negative blood can be given to rh positives, but not vice versa(actually it can be given once if no antibodies exist, after which antibodies … Continue reading What does it mean to be rhesus negative?