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.
The Rh antibodies can cross the placenta and attack the baby's red blood cells. This can lead to hemolytic anemia (HEE-moh-lit-ick uh-NEE-me-uh) in the baby. Hemolytic anemia is a condition in which red blood cells are destroyed faster than the body can replace them.