Djaldetti M, Goldman J A, Fishman P
Biol Neonate. 1978;33(3-4):177-83. doi: 10.1159/000241069.
The presence of the different blood series in the peripheral blood of 10- to 18-week-old human embryos was followed by electron microscopy. It has been demonstrated that the earlier the stage of embryonic development, the more immature cells are found in the peripheral blood. This phenomenon may suggest migration of blood cell progenitors from earlier to more definitive sites of embryonic erythropoiesis.
利用电子显微镜对10至18周龄人类胚胎外周血中不同血型的存在情况进行了追踪研究。结果表明，胚胎发育阶段越早，在外周血中发现的未成熟细胞就越多。这一现象可能提示血细胞祖细胞从胚胎红细胞生成的早期部位迁移至更具决定性的部位。
