Haemolytic Disease of the Fetus and Newborn

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چکیده

The antibodies responsible for haemolysis can be naturally occuring (eg, anti-A or anti-B antibodies) or can develop as a result of a sensitising event such as pregnancy or transfusion. The most well recognised is rhesus alloimmunisation (Greek: allo = 'other' or 'different from') which begins with red blood cells from a rhesus-positive fetus crossing the placental barrier during pregnancy and delivery, and entering the maternal blood circulation. A rhesus-positive father and a rhesus-negative mother are required for this situation to develop. The incompatible antigens introduced result in a primary immune response and stimulate the production of maternal antibodies. A very small amount of fetal-maternal haemorrhage (FMH) needs to occur (less than 0.1 ml) and most go unrecognised. Primary exposure can also be the result of amniocentesis, chorionic villus sampling and cordocentesis.

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تاریخ انتشار 2017