Objective:To study the effects of Yigutang on bone mineral density and biodynamics and correlation between them of ovariectomixed(OVX)rats and to find out its mechanism.Methods:After 12 weeks of operation, 40 female Wistar rats were divided into 4 groups.Administer saline after ovariectomy to Group A(control),administer Yigutang after ovariectomy to Group B,administer α-D3 after ovariectomy to Group C(positive control)and administer saline after sham operation to Group D(sham-op),and sacrifice at 12 weeks o...