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应用造血祖细胞体外培养和流式细胞术（ＦＣＭ），观察了脐血中粒一单系祖细胞（ＣＰＵ－ＧＭ）、红系祖细胞（ＢＦＵ－Ｅ）的数量和特性，并对其细胞增殖周期和骨贿及成人外周血做了比较，实验提示脐血中含丰富的ＣＦＵ－ＧＭ和ＢＦＵ－Ｅ，其数量低于成人骨髓而大大超过外周血水平，脐血红系祖细胞对ＥＰＯ、ＢＰＡ表现出更高的敏感性，而粒系祖细胞对ＣＳＦ的敏感性和骨髓比较似无明显差别．脐血Ｓ期、Ｇ２＋Ｍ期，及Ｓ＋Ｇ２Ｍ期细胞数均明显低于骨髓，虽略高于外周血各期细胞数，但差别无显著性意义．
Hematopoietic progenitor cells were cultured in vitro and flow cytometry (FCM). The numbers and characteristics of monocyte-derived single-lineage progenitor cells (CPU-GM) and erythroid progenitor cells (BFU-E) in cord blood were observed. Proliferation cycle and bone bones and adult peripheral blood were compared, experiments suggest that cord blood is rich in CFU-GM and BFU-E, the number of which is significantly lower than the adult bone marrow and peripheral blood levels, umbilical cord blood progenitor cells EPO, BPA showed a higher sensitivity, and myeloid progenitor cells on CSF sensitivity and bone marrow seemed to be no significant difference. The numbers of cells in S phase, G2 + M phase and S + G2M phase in cord blood were all significantly lower than those in bone marrow, though the difference was not significant.