RBCs morphological analysis of cord blood samples. The predominant RBC morphological features (out of 100 samples) are depicted in the table (right). Samples were scored positive only if at least 5–10% of the RBC in the sample had the designated morphology. Left: number of NRBC/100 WBC in cord blood samples. Samples were divided into groups according to their NRBC content. Arrow – the mean NRBC/100 WBC per cord blood sample (5.7 ± 6.2). RBCs, red blood cells; NRBC, nucleated red blood cells; WBCs, white blood cells.