1Olivennes F,Kadhel P,Rufat P,et al.Perinatal outcome of twin pregnancies obtained after in vitro fertilization:comparison with twin pregnancies obtained spontaneously or after ovarian stimulation[J].Fertil Steril,1996,66(1):105-109
2Daniel Y,Schreiber L,Geva E,et al.Morphologic and histopathologic characteristics of placentas from twin pregnancies spontaneuously conceived and from reduced and nonreduced assisted reproductive technologies[J].J Reprod Med,2001,46(8):735-742
3Westergarrd HB,Johansen AM,Erb K,et al.Danish National In-Vitro Fertilization Registry 1994 and 1995:a controlled study of births,malformations and cytogenetic findings[J].Hum Report,1999,14(7):1896-1902
4Daniel Y,Ochshorn Y,Fait G,et al.Analysis of 104 twin pregnancies conceived with assisted reproductive technologies and 193 spontaneuously conceived twin pregnancies[J].Fertil Steril,2000,74(4):653-659
5Zuppa AA,Maragliano G,Scapillat ME,et al.Neonatal outcome of spontaneous and assisted twin pregnancies[J].Eur J obstet Gynecol Reprod Biol,2001,95(1):68-72
4Ombelet W, Martens G, De Sutter P, et al. Perinatal outcome of 12021 singleton and 3108 twin births after non IVF-assisted reproduction: a cohort study[J]. Hum Reprod, 2006, 21(4): 1025-1032.
5Ombelet W, Martens G, De Sutter P, et al. Perinatal outcome of 12021 singleton and 3108 twinbirths after non-/VF-assisted reproduction: a cohortstudy [J]. Hum Reprod, 2006, 21 (4): 1025-32.
6乐杰主编.妇产科学[M].第6版.北京:人民卫生出版社,2003.141～142.
7Andersen AN,Gianaroli L,Felberbaum R,et al.Assisted reproduc-tive technology in Europe,2002:Results generated from European registers by ESHRE[J].Hum Reprod,2006,21:1680-1697.
8Gunby J,Bissonnette F,Librach C,et al.Assisted reproductive technologies(ART)in Canada:2006 results from the Canadian ART Register[J].Fertil Steril,2010,93:2189-2201.
9Wilson EE.Assisted reproductive technologies and multiple gesta-tions[J].Clin Perinatol,2005,32:315-328.
10Ericson A,Kallen B.Congenital malformations in infants born af-ter IVF:A population-based study[J].Hum Reprod,2001,16.-504-509.
