[Prenatal determination of fetal RhD-positivity from the blood of the RhD-negative mother].

It is reported on a prenatal determination of fetal RhD blood group from blood of a sensitized RhD-positive mother at 11th week gestation. The result was confirmed by a subsequent amplification of fetal DNA obtained by chorionic villus biopsy. It is supposed that in sensitized pregnancies the high number of fetal RhD-positive red blood cells in maternal blood is enough to be detectable by polymerase chain reaction.