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.
- ABO incompatibilities occur in approximately 20-25% of pregnancy. Yet, only 1 in 10 of these children have laboratory evidence of hemolytic disease. The hemolytic disease is severe enough to warrant treatment in only 1 in 200 cases.