Objective:To observe the influence of sidenafil citrate on the ovarian and uterine artery blood flow in the infertile women. Methuds:In the cases of IUI changes of the ovarian and uterine artery s pulsatility index(PI) and resistance index(RI)

were observed using transabdominal color Doppler flow image before and after treatment with sidenafil citrate (Viagra) .The PI and RI were inspected and the uterine endometrial development was examined simultaneously. Results: The PI and RI of the ovarian and uterine artery blood flow was decreased significantly by sidenafil citrate (P<0.05). Conclusion :Sidenafil citrate can effectively decrease the blood supply of the ovary and uterus.