2Snjezana S,Zvan K,Dinka P,et al. Maternal neonatal outcome in quaderuplet and quintuplet versus triplet gestations[J]. Eur J Obstet Gynecol Reprod Bio,2000,147(1):1523-1525.
3Mansour RT, Aboulghar MA, Serour GZ, et al. Multifetal pregnancy reduction: modification of the technique and analysis of the outcome[J]. Fertil Steril, 1999 ,71(2): 380-384.
4Carreno CA, Yaran Y. First-trimester embryo size discordance a predictor of premature birth following multifetal pregnancy reduction[J]. Fertil Steril, 2001,75(2):391-393.
5Haning R, Seifer D. Effects of fetal number and multifetal reduction on length of in vitro fertilization pregnancies[J]. Obestet Gynecol, 1996,87(2):964-968.
6Boulot P,Vagnal J,Vergnes C,et al. Multifetal reduction of triplets to twins: a prospective comparison of pregnancy outcome. Hum Reprod, 2000,15:1619-1623.
8Newman R,Hamer C ,Miller M. Outpatient triplet management:a contemporary review. Am J Obstet Gynecol,1989,161:547-553.
9Berkowitz RL,Lynch L,Stone J,et al.The current status of multifetal pregnancy reduction. Am J Obstet Gynecol. 1996,174:1265-1272.
10Evans MI,Kramer RL,Yaron Y,et al. What are the ethical and technical problems associated with multifetal pregnancy gestation? Clin Obstet Gynecol, 1998,41:47-54.