Before revision: Medical uses Prevention of RhD alloimmunization in pregnancy Image of a positive Kleihauer–Betke test; the pink smudges are foetal-haemoglobin-containing red blood cells that have entered maternal circulation.
After revision: Medical uses Prevention of alloimmunization Alloimmunization: mechanism, timing Image of a positive Kleihauer–Betke test; the pink smudges are foetal-haemoglobin-containing red blood cells that have entered maternal circulation.