Women's age and embryo developmental speed accurately predict clinical pregnancy after single vitrified-warmed blastocyst transfer

Gardner, 1999, In vitro culture of human blastocyst, 377 Gardner, 2000, Blastocyst score affects implantation and pregnancy outcome: towards a single blastocyst transfer, Fertil. Steril, 73, 1155, 10.1016/S0015-0282(00)00518-5 Goto, 2011, Prediction of pregnancy rate by blastocyst morphological score and age, based on 1,488 single frozen-thawed blastocyst transfer cycles, Fertil. Steril, 95, 948, 10.1016/j.fertnstert.2010.06.067 Hill, 2013, Trophectoderm grade predicts outcomes of single-blastocyst transfers, Fertil. Steril, 99, 1283, 10.1016/j.fertnstert.2012.12.003 Japan Society of Obstetrics and Gynecology Kato, 2012, Minimal ovarian stimulation combined with elective single embryo transferpolicy: age-specific results of a large, single-centre, Japanese cohort, Reprod. Biol. Endocrinol, 10, 35, 10.1186/1477-7827-10-35 Kuwayama, 2007, Highly efficient vitrification for cryopreservation of human oocytes and embryos: the Cryotop method, Theriogenology, 67, 73, 10.1016/j.theriogenology.2006.09.014 Lee, 2012, Cleavage speed and implantation potential of early-cleavage embryos in IVF or ICSI cycles, J. Assist. Reprod. Genet, 29, 745, 10.1007/s10815-012-9777-z Liebermann, 2006, Comparison of vitrification and conventional cryopreservation of day 5 and day 6 blastocysts during clinical application, Fertil. Steril, 86, 20, 10.1016/j.fertnstert.2006.01.029 Matsuura, 2010, Blastocyst quality scoring based on morphologic grading correlates with cell number, Fertil. Steril, 94, 1135, 10.1016/j.fertnstert.2009.11.003 Okimura, 2009, Relations between the timing of transfer, expansion size and implantation rates in frozen thawed single blastocyst transfer, Fertil. Steril, 92, S246, 10.1016/j.fertnstert.2009.07.1619 Stehlik, 2005, Vitrification demonstrates significant improvement versus slow freezing of human blastocysts, Reprod. Biomed. Online, 11, 53, 10.1016/S1472-6483(10)61298-9 Sunkara, 2010, The influence of delayed blastocyst formation on the outcome of frozen-thawed blastocyst transfer: a systematic review and meta-analysis, Hum. Reprod, 25, 1906, 10.1093/humrep/deq143 Teramoto, 2007, Minimal ovarian stimulation with clomiphene citrate: a large-scale retrospective study, Reprod. Biomed. Online, 15, 134, 10.1016/S1472-6483(10)60701-8