| [1] Hall JG. Twinning[J]. Lancet，2003，362:735-743.[2] Meyers C, Adam R, Dungan J, et al. Aneuploidy in twin gestations: when is maternal age advanced?[J]. Obstet Gynecol, 1997, 89:248-251.[3] Rodis JF, Egan JF, Craffey A,et al.Calculated risk of chromosomal abnormalities in twin gestations[J]. Obstet Gynecol, 1990,76:1037-1041.[4] Sebire NJ, Snijders RJ, Hughes K,et al. Screening for trisomy 21 in twin pregnancies by maternal age and fetal nuchal translucency thickness at 10–14 weeks of gestation[J]. Br J Obstet Gynaecol ,1996,103:999-1003.[5] Kagan KO, Gazzoni A, Sepulveda-Gonzalez G, et al. Discordance in nuchal translucency thickness in the prediction of severe twin-to-twin transfusion syndrome[J]. Ultrasound Obstet Gynecol, 2007,29:527-532.[6] Wald NJ, Rish S, Hackshaw AK.Combining nuchal translucency and serum markers in prenatal screening for Down syndrome in twin pregnancies[J].Prenat Diagn,2003,23:588-592.[7] Bush MC, Malone FD. Down syndrome screening in twins[J]. Clin Perinatol, 2005, 32:373-386.[8] Audibert F, Gagnon A. Prenatal screening for and diagnosis of aneuploidy in twin pregnancies[J]. J Obstet Gynaecol Can, 2011, 33(7):754-767.[9] The Canadian Early and Mid-trimester Amniocentesis Trial (CEMAT) Group.Randomised trial to assess safety and fetal outcome of early and midtrimester amniocentesis[J]. Lancet, 1998, 351:242-247.[10] Rochon M, Eddleman KA, Stone J. Invasive procedures in multifetal pregnancies[J]. Clin Perinatol, 2005, 32:355-371.[11] Agarwal K, Alfirevic Z. Pregnancy loss after chorionic villus sampling and genetic amniocentesis in twin pregnancies: a systematic review[J].Ultrasound Obstet Gynecol, 2012, 40:128-134.[12] McFadyen I. The dangers of intra-amniotic methylene blue[J]. Br J Obstet Gynaecol,1992,99:89-90.[13] Sonek JD, Iams JD, Blumenfeld M, et al. Measurement of cervical length in pregnancy: comparison between vaginal ultrasonography and digital examination[J].Obstet Gynecol, 1990, 76:172-175.[14] Conde-Agudelo A, Romero R, Hassan SS, et al. Transvaginal sonographic cervical length for the prediction of spontaneous preterm birth in twin pregnancies: a systematic review and meta-analysis[J]. Am J Obstet Gynecol, 2010, 203:128.e1-12.[15] Kindinger LM, Poon LC, Cacciatore S, et al. The effect of gestational age at cervical length measurements in the prediction of spontaneous preterm birth in twin pregnancies: an individual patient level meta-analysis[J].BJOG, 2015,Sep 1. doi: 10.1111/1471-0528.13575. [Epub ahead of print].[16] Khalil MI , Alzahrani MH , Ullah A. The use of cervical length and change in cervical length for prediction of spontaneous preterm birth in asymptomatic twin pregnancies [J]. Eur J Obstet Gynecol Reprod Biol, 2013, 169:193-196.[17] Singer E，Pilpel S，Bsat F，et al．Accuracy of fetal fibronectin to predict preterm birth in twin gestations with symptoms of labor[J].Obstet Gynecol, 2007, 109(5) : 1083-1087.[18] Rebarber A, Bender S, Silverstein M, et al. Outcomes of emergency or physical examination-indicated cerclage in twin pregnancies compared to singleton pregnancies[J].Eur J Obstet Gynecol Reprod Biol, 2014, 173:43-47.[19] Berghella V, Roman A.Cerclage in twins: we can do better! [J]. Am J Obstet Gynecol, 2014, 211(1): 5-6.[20] Roman A, Calluzzo I, Fleischer A, et al. 804: Physical examination indicated cerclage in twin pregnancy[J]. Am J Obstet Gynecol, 2014, 210(Suppl):S391-392.[21] Schuit E, Stock S, Rode L,et al.Global Obstetrics Network (GONet) collaboration. Effectiveness of progestogens to improve perinatal outcome in twin pregnancies: an individual participant data meta-analysis[J]. BJOG, 2015, 122:27-37.[22] Liem S, Schuit E, Hegeman M, et al. Cervical pessaries for prevention of preterm birth in women with a multiple pregnancy (ProTWIN): a multicenter, open-label randomized controlled trial[J]. Lancet, 2013, 382:1341-1349.[23] Nicolaides KH, Syngelaki A, Poon LC,et al. Cervical pessary placement for prevention of preterm birth in unselected twin pregnancies: a randomized controlled trial[J]. Am J Obstet Gynecol, 2016, 214(1):3.e1-9[24] Dias T，Mahsud-Dornan S，Bhide A. Cord entanglement and perinatal outcome in monoamniotic twin pregnancies[J].Ultrasound Obstet Gynecol, 2010, 35(2):201-204.[25] D’Alton ME. Delivery of the second twin[J].Obstet Gynecol, 2010, 115(2):221.[26] Barret Jon FR，Hannah ME，Hutton EK，et al.The Twin Birth Study Collaborative Group:a randomized trial of planned cesarean or vaginal birth for twin pregnancies[J]. N Engl J Med, 2013, 369(14):1295-1305.[27] Edris F, Oppenheimer L, Yang Q, et al. Relationship between intertwin delivery interval and metabolic acidosis in the second twin[J]. Am J Perinatol, 2006, 23(8):481-485.[28] Stein W, Misselwitz B, Schmidt S. Twin-to-twin delivery time interval: influencing factors and effect on short term outcome of the second twin[J].Acta Obstet Gynecol Scand, 2008, 87(3):346-353.[29] Hisanori M，Ikuo S. Reestimating date of delivery in multifetal pregnancies[J]. JAMA, 1996, 275(18):1432-1434.[30] Scholl J, Russell M. Optimum timing for planned delivery of uncomplicated monochorionic and dichorionic twin pregnancies[J]. Obstet Gynecol, 2012, 119(6):50-59.[31] Van Mieghem T , De Heus R, Ryan G，et al. Prenatal management of monoamniotic twin pregnancies[J]. Obstet Gyncol, 2014, 124(3):498-506.（2016-01-30收稿） |
