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.
Hemolytic disease of the newborn. Hemolytic disease of the newborn (HDN) is a disease in which there is hemolysis in a newborn or fetus caused by blood-group incompatibility between mother and child. Immune hydrops (Hydrops means accumulation of edema fluid in the fetus during intrauterine growth.