Why do some patients accept some blood fractions and not others?
• It can be noted that plasma proteins (fractions) move from a pregnant woman’s blood to the separate blood system of her fetus. Thus a mother passes immunoglobulins to her child, providing valuable immunity. Separately, as a fetus’ red cells complete their normal life span, their oxygen-carrying portion is processed. Some of it becomes bilirubin, which crosses the placenta to the mother and is eliminated with her body wastes. Some may conclude that since blood fractions can pass to another person in this natural setting, they could accept a blood fraction derived from blood plasma or cells.
