1Tiitinen A, Husa LM, Tulppala M, et al. The effect of cryopreservation in prevention of ovarian hyperstimulation syndrome[J]. Br J Obstet Gynecol, 1995,102(4):326-329.
2Lurie D, Check JH, Nazari A, et al. Cumulative pregnancy rates after four embryo transfers of either fresh or frozen embryos[J]. Clin Exp Obstet Gynecol, 2001,28 (3) : 148- 152.
3Schnorr JA, Doviak MJ, Muasher SJ, et al. Impact of a cryopreservation program on the multiple pregnancy rate associated with assisted reproductive technologies[J]. Fertil Steril, 2001,75 ( 1 ) : 147-151.
4Sehalkoff ME, Oskowitz SP, Powers RD, et al. A multifaetorial analysis of the pregnancy outcome in a successful embryo eryopreservation program[J]. Fertil Steril, 1993,59 (5) : 1070-1074.
5Mc Kiernan SH, Bavister BD. Timing of development is a critical parameter for predicting successful embryogenesis[J]. Hum Reprod,1994,9(11) :2123-2129.
6Ziebe S, Petersen K, Lindenberg S, et al. Embryo morphology or cleavage stage: how to select the best embryos for transfer after in-vitro fertilization[J]. Hum Reprod, 1997,12 (7):1545-1549.
7Racowsky C, Combelles CM, Nureddin A, et al. Day3 and Day5 morphological predictors of embryo viability [J]. Reprod Biomed Online,2003,6(3) :323-331.
8Guerif F, Bidault R, Cadoret V, et al. Parameters guiding selection of best embryos for transfer after cryopreservation:a reappraisal[J]. Hum Reprod,2002,17(6) : 1321-1326.
9Edgar DH, Archer J, Gook DA, et al. Survival and developmental potential of stored human early cleavage stage embryos[J]. Eur J Obstet Gynecol Reprod Biol, 2004,115 [Suppl I] :S8-11.
10Hartshorne GM, Wick K, Elder K, et al. Effect of cell number at freezing upon survival and viability of cleaving embryos generated from stimulated IVF cycles [J]. Hum Reprod, 1990,5(7) :857-861.
5Testart J, Laselle B, Belaissch-Mlart J, et al. High pregnancy rate after early human embryo freezing. Fertil Steril, 1986, 46:268 -272.
6Veeck L. Preembryo grading and degree of cytoplasmic fragmentation. In: Veeck L, ed. An atlas of human gametes and conceptuses; an illustrated reference for assisted reproductive technology. New York: the Parthenon Publishing Group, 1999: 46-51.
7JOINT SOGC-CFAS. Guidelines for the number of embryos to transfer following in vitro fertilization No. 182, September 2006. Int J Gynaecol Obstet, 2008, 102: 203-216.
8Twisk M, Van der Veen F, Repping S, et al. Preferences of subfertile women regarding elective single embryo transfer: additional in vitro fertilization cycles are acceptable, lower pregnancy rates are not. Fertil Steril, 2007, 88:1006-1009.
9Ghazala Sikandar Basir, Wai-sum O, Ernest Hung Yu Ng, et al. Morphometric analysis of peri-implantation endometrium in patients having excessively high oestradiol concentrations after ovarian stimulation. Hum Reprod, 2001, 16 : 435-440.
10Haouzi D, Assou S, Mahmoud K, et al. Gene expression profile of human endometrial receptivity: comparison between natural and stimulated cycles for the same patients. Hum Reprod, 2009,24 : 1436-1445.