1Sebire NJ,Snijders RJ,Santiago C,et al.Management of twin pregnancies with fetal trisomies.Br J Obstet Gynaecol,1997,104:220.
2Dumez Y,Oury JF.Method for first trimester selective abortion in multiple pregnancy[].Contributions to Gynecology and Obstetrics.1986
3Dechaud H,Picot MC,Hedon B,et al.First-trimester multifetal pregnancy reduction : evaluation of technical aspects and risks from 2756 cases in the literature[].Fetal Diagnosis and Therapy.1998
4D ickey RP,Taylor SN,Lu PY,et al.Spontaneous reduction of multiple pregnancy: incidence and effect on outcome[].American Journal of Obstetrics and Gynecology.2002
6Blickstein I,Jones C,Keith LG.Zygotic-splitting rates after single embryo transfers in vitro fertilization[J].N Engl J Med,2003,348:2366-2367.
7Sills ES,Tucker MJ,Palermo GD.Assisted reproductive technologies and monozygous twins:implications for future study and clinical practice[J].Twin Res,2000,3:217-223.
8Alikani M,Cekleniak NA,Walters E,et al.Monozygotic twinning following assisted conception:an analysis of 81consecutive cases[J].Hum Reprod,2003,18:1937-1943.
9Imaizumi Y.A comparative study of zygotic twinning and triplet rates in eight countries,1972-1999[J].J Biosoc Sci,2003,35:287-302.
10Holcberg G,Biale Y,Lewenthal H,et al.Outcome of pregnancy in 31triplet gestations[J].Obstet Gynecol,1982,59:472-476.
