Abstract: Abstract Objective To evaluate the role of ultrasonography in the diagnosis and intervention therapy of cesarean scar pregnancy. Methods Collected records of 32 patients of our hospital with cesarean scar pregnancy diagnosed and managed with intervention therapy.The sample patients were enrolled from Jan.2006 to Dec. 2009.Analyzed Color Doppler sonographic features, ultrasonography after intervention therapy and follow up with pathologic finding. Results Among the 32 patients with cesarean section scar pregnancy , 6 patients were treated with intervention therapy solely, 16 patients with intervention therapy and curettage, 4 patients with intervention therapy and MTX ,4 patients with intervention therapy and MTX and curettage ,2 patients with intervention therapy and MTX and hysterectomy. In the course of the intervention therapy, ultrasound showed the focus size and the blood flow changes, combined with clinical blood HCG examination, provide the technical support for clinical treatment. Conclusions Color Doppler ultrasonography can provide relatively accurate localization and qualitative diagnosis for cesarean section scar pregnancy, Color Doppler Ultrasonography may assist with the assessment of the clinical treatment program course and outcome of patients based on imaging features.

Key words: ultrasonography, Doppler, color, cesarean, scar, pregnancy, intervention therapy