The principles and results of noninvasive prenatal diagnosis in serological conflicts in Poland were described in the following work. Noninvasive fetal genotyping from plasma of immunized mother identifies women carrying fetus without incompatible antigen and risk of hemolytic disease. The presence of fetal RHD gene or RHCE*c/E alleles in maternal plasma is examined routinely in Institute of Hematology and Blood Transfusion in Warsaw. Preliminary results of successful fetal KEL*1 genotyping from maternal blood were obtained.