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.
Severe red blood cell breakdown results in anemia and high levels of bilirubin in the blood (hyperbilirubinemia). Hemolytic disease of the newborn may cause the newbornâs red blood cells to be destroyed rapidly. The red blood cells may also be rapidly destroyed if the newborn has a hereditary abnormality of the red blood cells.