Rhesus disease is a condition where antibodies in a pregnant woman's blood destroy her baby's blood cells. It's also known as haemolytic disease of the foetus and newborn (HDFN).
Rhesus disease doesn't harm the mother, but it can cause the baby to become anaemic and develop newborn jaundice.
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Click here to read about the symptoms of rhesus disease in a baby (opens in new tab)