Fetal Rhesus Blood Group Test
A maternal blood sample is taken so that the baby’s DNA can be extracted and tested (NIPT) to identify the baby’s blood group. Useful when a rhesus negative pregnant woman has red cell antibodies and her partner’s blood group is heterozygous or unknown.
If the baby’s rhesus blood group is different form the mother, it may be at risk of anaemia and jaundice and anti-D would be advised. If the baby is the same rhesus blood group as the mother then it is not at risk and the mother does not need anti-D.