5[2]KU~ARK A,CRVENKOVIE G,SALIHANIE A,et al,The assessment of normalearly pregnancy by transvagihal Color Doppler Uhrasonography[J].JCU,1993,21:3.
6[3]CRAVEN C M,CHEDWICH L R,WARD K,et al.Placental basal plate formation is associated with fibrin deposition in decidual veins at sites of trophoblast cell invasion[J].Am J Obstet Gynecol,2002,186(2):291-296.
8[12]MICHAEL B.COLOR doppler in the diagnosis of ectopic pregrancy in the e-mergency department:is there anything beyond a mass and fluid[J].J Emerg Med,2002,22(4):379-384.