1[1]Tao J,Craig RH,Johnson M,et al,.Cryopreservation of human embryos at the morula stage and outcomes after transfer[J].Fertil Steril.2004,82(1):108-118.
2[2]Blake DA,Farquhar CM,Johnson N,et al.Cleavage stage versus blastocyst stage embryo transfer in assisted conception[J].Cachrane Database Syst Bey,2007,17(4):CD002 118.
3[3]Stokes PJ,Hawkhead JA,Fawthrop RK,et al.Metabolism of human embryos following cryopreservation:implications for the safety and selection of embryos for transfer in clinical IVF[J].Hum Reprod,2007,22(3):829-835.
4[4]EL-Toukhy T,Khalaf Y,AL-Darazi K,et al.Effect of blasto-mere losa on the outcorae of frozen embryo replacement cycles[J].Fertil Steri,2003,79(5):1 106-1 111.
5[5]Karlstrom PO,Bergh T,Forsberg AS,et al.Prognostie factors for the success rate of embryo freczing[J].Hum Repred,1997,12(6):1 263-1 266.
5Oehninger S, Mayer J, Musaher S. Impact of different clinical variables on pregnancy outcome following embryo cryopreservation[J]. Mol Cell Endocrinol,2000,169(1-2):73.
6Fabrice G, Rachel B, Veronique C, et al. Parameters guiding selection of best embryos for transfer after cryopreservation: a reappraisal [J]. Hum deprod,2002,17 (5):1321.
7Emiliani S, Van-den-Bergh M, Vanin AS, et al. The outcome of cryopreserved human embryos after intracytoplasmic sperm injection and traditional IVF [J]. J Assit Reprod Genet, 199936(8):405.
8Edgar DH, Bourne H, Jericho H, et al. The developmental potential of cryopreserved human embryos[J]. Mol Cell Endocrinol,2000,169(1-2):69.
9Bals-Pratsch M, A1-Hasani S, Schopper B, et al. A simple, inexpensive and effective artificial cycle with exogenous transdermal oestradiol and vaginal progesterone for the transfer of cryopreserved pronucleated human oocytes in women with normal cycles [J]. Hum Reprod,1999,14(Suppl): 1222.
10Check JH, Katsoff D,Brittingham D, et al. Comparabale implantation rates with fresh vs frozen embryo transfer suggests that controlled ovarian hyperstimulation has an adverse effect on conception outcome[J]. Clin Exp Obstet Gynecol,2000,27(3-4): 173.
5Balaban B, Yakin K, Isiklar A, et al. Utilization of high security straws for embryo freezing in an in vitro fertilization program : a prospective randomized study[ J]. Fertil Steril, 2007,87:691-669.
7Courtney B, Sheehan, Michelle Lane et al. The cryoloop facilitates revitrification of embryos at four successive stages of development without impairing embryo growth [J]. Hum Reprod, 2006, 21 (11): 2978.
8Balaban B, Urman B, Ata B et al. A randomized controlled study of human Day 3 embryo cryopreservation by slow freezing or vitrification: vitrification is associated with higher survival, metabolism and blastocyst formation [J] . Hum Reprod,2008, 23 (9). 1976.
9Takahashi K, Mukaida T, Goto T et al. Perinatal outcome of blastocyst transfer with vitrification using cryoloop: a 4 - year follow-up study [J]. Fertil Steril, 2005, 84 (1): 88.
10Bielanski A, Nadin -Davis S, Sappi T et al. Viral contamination of embryos eryopreserved in liquid nitrogen [J]. Cryobiology, 2000, 40 : 110.