4Gary MM,Harrison DJ.Analysis of severe adverse events related to the use of mifepristone as an abortifacient[J].Ann Pharmacother.2006 Feb,40(2):191-197.
5O'Brien WF.The role of prostaglandins in labor and delivery[J].Clin Perinatol,1995,22:973-976.
2Di Luigi G,Patacchiola F,La Posta V,et al.Early ovarian pregnancy diagnosed by ultrasound and successfully treated with multidose methotrexate.A case report.Clinical and experimental obstetrics and gynecology,2012,39(3):390-393.
3Alcazar JL,Ortiz CA.Transvaginal color Doppler ultrasonography in the management of first-trimester spontaneous abortion..European Journal of Obstetrics.Gynecology and Reproductive Biology,2002,102(1):83-87.
4V C Y Lee,T W Y Yeung,O S Tang,et al.Effect of letrozole on uterine artery Doppler flow indices prior to first-trimester termination of pregnancy:a randomized controlled trial.Ultrasound in obstetrics& gynecology,2012,40(4):392-397.
5Ultrasound may be required before abortion in Virginia.New scientist,2012,213(2853):1-1.
6Di Luigi G, Patacchiola F, La Posta V, et al. Early ovarian pregnancy diagnosed by ultrasound and successfully treated with multidose methotrexate. A case report[J]. Clin Exp Obstet Gynecol, 2012, 39(3): 390-393.