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.
Similar reactions (but resulting from different antigens) produces hemolytic disease of the newborn. With the first pregnancy, the mother will be exposed to the D protein for the first time. During the pregnancy itself, little fetal blood makes it into the mother's system and there is generally no problem.uring a first pregnancy with an Rh+ child, there are usually few problems related to the blood type disparity (as shown in the picture below). With the first pregnancy, the mother will be exposed to the D protein for the first time.