Is there certain blood types more prone to miscarriages. i am a o+. also is there certain blood types that have a hard time staying pregnant my fianc is a a+

Miscarriage ?'s: The only blood type incompatibility that can cause miscarriage is related to Rh factor, not A/B/O types. An Rh negative mother with an Rh positive fetus can create serious problems with destruction of fetal cells, more common in first pregnancies, but protection can be achieved via use of gamma globulin ("Rhogam") periodically during pregnancy in women with Rh negative type.