“Rh negative?”
Both myself and my daughter have A+ blood type but RH negative. We both had to have shots during and after pregnancy. How rare is this and how does this happen?
Female | 48 years old
3 Answers
Hematologist(BloodSpecialist)Hematologist
I can't say exactly how rare this situation is, but I would say it is at least uncommon to have an Rh titer that is technically detectable by laboratory standards, but clinically inactive enough to have the potential to form antibodies against Rh.
It is not rare and happens with a Rh negative mother and Rh positive father. The injections are to destroy any Rh positive father red cells from the mother's circulation so she doesn't produce antibodies to positive red cell that can cross over to the fetus and kill it if it has Rh positive blood.
A+Rh- is rare, less than 10% of blood types. It is thus rare for you both to have that blood type but not impossible as the blood types are inherited from parents just as other traits are.
