Parents of the same blood type have disabled children?
September 9, 2013 6:29 AM Subscribe
What is the historical/scientific background for the theory that it is problematic for individuals of the same blood type to have children, and that it will lead to disability in the child? I have come across this idea several times from individuals from (I think) India or Bangladesh.
posted by thegreatfleecircus to society & culture (7 answers total)
Did the myth develop to dissuade consanguinous relationships and their genetic disorders? Perhaps it is related to problematically rare blood types (Bombay Blood Group), which is a situation that may not be as salient elsewhere?
I know nothing about this subject, but I've seen it come up enough, and seen so many patronizing dismissals of people's concerns (or repeated semi-unrelated explanations of +/- Rh incompatibility), that I became curious about the background of such a specific idea. I also can't imagine the history of this theory going back overly-far, considering the specifics of blood testing and semi-short history of blood groups, etc. I also know that sometimes a myth is just a myth, but this one seems so very specific.
Many thanks for any background related to the subject.