BACKGROUND: It is recognized that phytoestrogen has the effect of preventing post-menopausal osteoporosis and one of the mechenisms undering it is that it can stimulate the proliferation and differentiation of osteoblasts. OBJECTIVE: To study the effects of isoimperatorin (coumarin phytoestrogen) on the proliferation and differentiation of osteoblasts in vitro. DESIGN, TIME AND SETTING: A controlled observational experiment was performed at the Faculty of Pharmacy, Hebei Medical University from September 20...