juxtaposition (plural juxtapositions) 1  The nearness of objects with little or no delimiter. 2  The extra emphasis given to a comparison when the contrasted objects are close together.
Hemolytic disease of the newborn (HDN), also known as alloimmune HDN or erythroblastosis fetalis, is a potentially fatal alloimmune condition where fetal red blood cells are destroyed by transplacentally acquired maternal antibodies. RhD is the most common offending paternal antigen.
alloantibody, several of which can cause moderate to severe hemolytic disease of the newborn as detailed in Table 2.15,16 Indeed, in addition to the classic Rhesus hemolytic disease of the newborn second-ary to Rh-D isoimmunization, alloantibodies directed to non-D Rhesus antigens and a broad range of non-Rhesus blood group antigens are seen.