4Sebire NJ, Snijders ILl, Hughes K, et al. The hidden mortality of monochorionic twin pregnancies[J]. Br J Obstet Gynaecol,1997, 104 : 1203-1207.
5Lewi L, Gucciardo L, Huber A, et al. Clinical outcome and placental characteristics of monochorionic diamniotic twin pairs with early- and late-onset discordant growth [ J ]. Am J Obstet Gynecol Nov ,200g, 199:511. el-7.
6Gratacos E, CarreraS E, Becker J, et al. Prevalence ofneurological damage in monochorlonic twins with selective intrauterine growth restriction and intermittent absent or reversed end-diastolic umbilical artery flow [ J ]. Ultrasound Obstet Gyneco1,2004,24 : 159-163.
7Ishii K, Murakoshi T, Takahashi Y, et al. Perinatal outcome of monochorionic twins with selective intrauterine growth restriction and different types of umbilical artery Doppler under expectant management[ J]. Fetal Diagn Ther,2009,26 : 157-161.
8Valsky DV, Eixarch E, Martinez JM, et al. Selective intrauterine growth restriction in monochorionic diamniotic twin pregnancies [ J]. Prenat Diagn,2010,30:719-726.
9Carrol SG, Soothill PW, Abdel-Fattah SA, et al. Prediction of chorionicity in twin pregnancies at 10-14 weeks of gestation [ J ]. BJOG, 2002, 109:182-186.
10Gratacos E, Lewi L, Munoz B, et al. A classification system for selective intrauterine growth restriction in monochorionic pregnancies according to umbilical artery Doppler flow in the smaller twin [ J ]. Ultrasound Obstet Gynecol,2007,30:28-34.