Keywords: تشخیص پیش از تولد; NRBC; Nucleated red blood cell; mAb; Monoclonal antibody; FACS; Fluorescence-activated cell sorter; CD; Cluster of differentiation; GPA; Glycophorin A; BFU-E; Burst-forming unit-erythoid; SBA; Soybean agglutinin; PCR; Polymerase chain reaction; FISH;