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.
What is hemolytic disease of the newborn (HDN) It is a relatively common condition in which a mother produces antibodies that cross the placenta and destroy the babyâs red blood cells. The baby becomes profoundly anemic, develops severe jaundice and heart failure. The mortality rate used to be approximately 50%.