Question: What is the most mysterious blood type?

The rarest blood type in existence is Rhnull blood. This stuff is characterized by a complete lack of antigens in the Rh system, which is the largest blood group system. This includes the D antigen (Rh factor, baby), plus the other 50-something antigens in the group.

What blood type is unique to humans?

Type O-negative blood is known as the universal donor because it lacks the molecules that would provoke that reaction (the negative means it lacks another type of surface molecule, known as the Rh antigen).

What blood type cant get pregnant?

A womans blood group could influence her chances of getting pregnant, scientists have found. Those with blood type O may struggle to conceive due to a lower egg count and poorer egg quality, while those with blood group A seem to be more fertile.

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