Angelica Sinensis is an important hematonic or antianemic in tranditional Chinese medicine well known. It has been proved that Angelica Sinensis can lower blood pressure

improve local microcirculation

and is also anticoagulative. The mechanism of Angelica Sinensis in activation of blood circulation and antihemostasis

and the correlation between these functions with the hemopoietic stem cells is unknown. To find the effect of Angelica Sinensis on the proliferation and differentiation of hemopoietic stem cells

observation of the effect of Angelica Sinensis on pluripotential stem cells (CFU-S) in mice by the technique of Colony formation was made. Data obtained and correlated with the result of proffessor Ma Lanfang’s study suggest that Angelica Sinensis may act upon the progenitor of erythropoietic system.