References
- Ahlstrom, A., Westin, C., Wikland, M., & Hardarson, T. (2013). Prediction of live birth in frozen-thawed single blastocyst transfer cycles by pre-freeze and post-thaw morphology. Human Reproduction, 28(5), 1199–1209. https://doi.org/https://doi.org/10.1093/humrep/det054.
- Alfarawati, S., Fragouli, E., Colls, P., Stevens, J., Gutierrez-Mateo, C., Schoolcraft, W. B., Katz-Jaffe, M. G., & Wells, D. (2011). The relationship between blastocyst morphology, chromosomal abnormality, and embryo gender. Fertility and Sterility, 95(2), 520–524. https://doi.org/https://doi.org/10.1016/j.fertnstert.2010.04.003.
- Barrenetxea, G., Lopez de Larruzea, A., Ganzabal, T., Jimenez, R., Carbonero, K., & Mandiola, M. (2005). Blastocyst culture after repeated failure of cleavage-stage embryo transfers: A comparison of day 5 and day 6 transfers. Fertility and Sterility, 83(1), 49–53. https://doi.org/https://doi.org/10.1016/j.fertnstert.2004.06.049.
- Berrin, A., Isil, K., Baris, A., Goktan, K., Seda, S., & Gurkan, U. (2019). A comparison of the survival and implantation rates of blastocysts that were vitrified on post-fertilization day five, six and seven. Human Fertility, 22(3), 204–211. https://doi.org/https://doi.org/10.1080/14647273.2018.1468091.
- Blake, D. A., Farquhar, C. M., Johnson, N., & Proctor, M. (2007). Cleavage stage versus blastocyst stage embryo transfer in assisted conception. Cochrane Database of Systematic Reviews, 2007(4), CD002118. https://doi.org/https://doi.org/10.1002/14651858.CD002118.pub3.
- Calhaz-Jorge, C., De Geyter, C., Kupka, M. S., de Mouzon, J., Erb, K., Mocanu, E., Motrenko, T., Scaravelli, G., Wyns, C., & Goossens, V. (2017). Assisted reproductive technology in Europe, 2013: Results generated from European registers by ESHRE. Human Reproduction, 32(10), 1957–1973. https://doi.org/https://doi.org/10.1093/humrep/dex264.
- Capalbo, A., Rienzi, L., Cimadomo, D., Maggiulli, R., Elliott, T., Wright, G., Nagy, Z. P., & Ubaldi, F. M. (2014). Correlation between standard blastocyst morphology, euploidy and implantation: An observational study in two centers involving 956 screened blastocysts. Human Reproduction, 29(6), 1173–1181. https://doi.org/https://doi.org/10.1093/humrep/deu033.
- Criniti, A., Thyer, A., Chow, G., Lin, P., Klein, N., & Soules, M. (2005). Elective single blastocyst transfer reduces twin rates without compromising pregnancy rates. Fertility and Sterility, 84(6), 1613–1619. https://doi.org/https://doi.org/10.1016/j.fertnstert.2005.06.035.
- El-Toukhy, T., Wharf, E., Walavalkar, R., Singh, A., Bolton, V., Khalaf, Y., & Braude, P. (2011). Delayed blastocyst development does not influence the outcome of frozen-thawed transfer cycles. BJOG: An International Journal of Obstetrics and Gynaecology, 118(13), 1551–1556. https://doi.org/https://doi.org/10.1111/j.1471-0528.2011.03101.x.
- Evans, J., Hannan, N. J., Edgell, T. A., Vollenhoven, B. J., Lutjen, P. J., Osianlis, T., Salamonsen, L. A., & Rombauts, L. J. (2014). Fresh versus frozen embryo transfer: Backing clinical decisions with scientific and clinical evidence. Human Reproduction Update, 20(6), 808–821. https://doi.org/https://doi.org/10.1093/humupd/dmu027.
- Fernando, D., Halliday, J. L., Breheny, S., & Healy, D. L. (2012). Outcomes of singleton births after blastocyst versus nonblastocyst transfer in assisted reproductive technology. Fertility and Sterility, 97(3), 579–584. https://doi.org/https://doi.org/10.1016/j.fertnstert.2011.12.032.
- Ferreux, L., Bourdon, M., Sallem, A., Santulli, P., Barraud-Lange, V., Le Foll, N., Maignien, C., Chapron, C., de Ziegler, D., Wolf, J. P., & Pocate-Cheriet, K. (2018). Live birth rate following frozen-thawed blastocyst transfer is higher with blastocysts expanded on Day 5 than on Day 6. Human Reproduction, 33(3), 390–398. https://doi.org/https://doi.org/10.1093/humrep/dey004.
- Friedman, B. E., Davis, L. B., Lathi, R. B., Westphal, L. M., Baker, V. L., & Milki, A. A. (2011). Age-related success with elective single versus double blastocyst transfer. International Scholarly Research Notices. ISRN Obstetrics and Gynecology, 2011, 1–6. https://doi.org/https://doi.org/10.5402/2011/656204.
- Gardner, D. K., Lane, M., Stevens, J., Schlenker, T., & Schoolcraft, W. B. (2000). Blastocyst score affects implantation and pregnancy outcome: Towards a single blastocyst transfer. Fertility and Sterility, 73(6), 1155–1158. https://doi.org/https://doi.org/10.1016/S0015-0282(00)00518-5.
- Haas, J., Meriano, J., Laskin, C., Bentov, Y., Barzilay, E., Casper, R. F., & Cadesky, K. (2016). Clinical pregnancy rate following frozen embryo transfer is higher with blastocysts vitrified on day 5 than on day 6. Journal of Assisted Reproduction and Genetics, 33(12), 1553–1557. https://doi.org/https://doi.org/10.1007/s10815-016-0818-x.
- Herrero, L., Martinez, M., & Garcia-Velasco, J. A. (2011). Current status of human oocyte and embryo cryopreservation. Current Opinion in Obstetrics & Gynecology, 23(4), 245–250. https://doi.org/https://doi.org/10.1097/GCO.0b013e32834874e2.
- Hiraoka, K., Hiraoka, K., Miyazaki, M., Fukunaga, E., Horiuchi, T., Kusuda, T., Okano, S., Kinutani, M., & Kinutani, K. (2009). Perinatal outcomes following transfer of human blastocysts vitrified at day 5, 6 and 7. Journal of Experimental & Clinical Assisted Reproduction, 6, 4. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2868303/
- Jacobs, M. B., Klonoff-Cohen, H., & Garzo, V. G. (2018). Equivalency of In vitro fertilization success rates in elective single blastocyst transfer and elective double blastocyst transfer: An example of equivalence methodology in clinical reproductive health. Journal of Human Reproductive Sciences, 11(1), 45–51. https://doi.org/https://doi.org/10.4103/jhrs.JHRS_136_17.
- Kaye, L., Will, E. A., Bartolucci, A., Nulsen, J., Benadiva, C., & Engmann, L. (2017). Pregnancy rates for single embryo transfer (SET) of day 5 and day 6 blastocysts after cryopreservation by vitrification and slow freeze. Journal of Assisted Reproduction and Genetics, 34(7), 913–919. https://doi.org/https://doi.org/10.1007/s10815-017-0940-4.
- Kolibianakis, E. M., Bourgain, C., Platteau, P., Albano, C., Van Steirteghem, A. C., & Devroey, P. (2003). Abnormal endometrial development occurs during the luteal phase of nonsupplemented donor cycles treated with recombinant follicle-stimulating hormone and gonadotropin-releasing hormone antagonists. Fertility and Sterility, 80(2), 464–466. https://doi.org/https://doi.org/10.1016/S0015-0282(03)00663-0.
- Kontopoulos, G., Simopoulou, M., Zervomanolakis, I., Prokopakis, T., Dimitropoulos, K., Dedoulis, E., Grigorakis, S., Agapitou, K., Nikitos, E., Rapani, A., & Vlahos, N. (2019). Cleavage stage versus blastocyst stage embryo transfer in oocyte donation cycles. Medicina, 55(6), 293. https://doi.org/https://doi.org/10.3390/medicina55060293.
- Kupka, M. S., D’Hooghe, T., Ferraretti, A. P., de Mouzon, J., Erb, K., Castilla, J. A., Calhaz-Jorge, C., De Geyter, C., & Goossens, V. (2016). Assisted reproductive technology in Europe, 2011: Results generated from European registers by ESHRE. Human Reproduction, 31(2), 233–248. https://doi.org/https://doi.org/10.1093/humrep/dev319.
- Levi-Setti, P. E., Menduni, F., Smeraldi, A., Patrizio, P., Morenghi, E., & Albani, E. (2016). Artificial shrinkage of blastocysts prior to vitrification improves pregnancy outcome: Analysis of 1028 consecutive warming cycles. Journal of Assisted Reproduction and Genetics, 33(4), 461–466. https://doi.org/https://doi.org/10.1007/s10815-016-0655-y.
- Liebermann, J., & Tucker, M. J. (2006). Comparison of vitrification and conventional cryopreservation of day 5 and day 6 blastocysts during clinical application. Fertility and Sterility, 86(1), 20–26. https://doi.org/https://doi.org/10.1016/j.fertnstert.2006.01.029.
- Mehta, V. P., Patel, J. A., Gupta, R. H., Shah, S. I., & Banker, M. R. (2018). One plus one is better than two: Cumulative reproductive outcomes are better after two elective single blastocyst embryo transfers compared to one double blastocyst embryo transfer. Journal of Human Reproductive Sciences, 11(2), 161–168. https://doi.org/https://doi.org/10.4103/jhrs.JHRS_117_17.
- Munné, S., Velilla, E., Colls, P., Garcia Bermudez, M., Vemuri, M. C., Steuerwald, N., Garrisi, J., & Cohen, J. (2005). Self-correction of chromosomally abnormal embryos in culture and implications for stem cell production. Fertility and Sterility, 84(5), 1328–1334. https://doi.org/https://doi.org/10.1016/j.fertnstert.2005.06.025.
- Papanikolaou, E. G., Kolibianakis, E. M., Tournaye, H., Venetis, C. A., Fatemi, H., Tarlatzis, B., & Devroey, P. (2008). Live birth rates after transfer of equal number of blastocysts or cleavage-stage embryos in IVF. A systematic review and meta-analysis. Human Reproduction, 23(1), 91–99. https://doi.org/https://doi.org/10.1093/humrep/dem339.
- Poulsen, V., Ingerslev, H. J., & Kirkegaard, K. (2017). Elective embryo transfers on day 6 reduce implantation compared with transfers on day 5. Human Reproduction, 32(6), 1238–1243. https://doi.org/https://doi.org/10.1093/humrep/dex059.
- Reed, M. L., Said, A. H., Thompson, D. J., & Caperton, C. L. (2015). Large-volume vitrification of human biopsied and non-biopsied blastocysts: A simple, robust technique for cryopreservation. Journal of Assisted Reproduction and Genetics, 32(2), 207–214. https://doi.org/https://doi.org/10.1007/s10815-014-0395-9.
- Roque, M., Haahr, T., Geber, S., Esteves, S. C., & Humaidan, P. (2019). Fresh versus elective frozen embryo transfer in IVF/ICSI cycles: A systematic review and meta-analysis of reproductive outcomes. Human Reproduction Update, 25(1), 2–14. https://doi.org/https://doi.org/10.1093/humupd/dmy033.
- Shapiro, B. S., Daneshmand, S. T., Garner, F. C., Aguirre, M., & Ross, R. (2008). Contrasting patterns in in vitro fertilization pregnancy rates among fresh autologous, fresh oocyte donor, and cryopreserved cycles with the use of day 5 or day 6 blastocysts may reflect differences in embryo-endometrium synchrony. Fertility and Sterility, 89(1), 20–26. https://doi.org/https://doi.org/10.1016/j.fertnstert.2006.08.092.
- Shapiro, B. S., Richter, K. S., Harris, D. C., & Daneshmand, S. T. (2001). A comparison of day 5 and day 6 blastocyst transfers. Fertility and Sterility, 75(6), 1126–1130. https://doi.org/https://doi.org/10.1016/S0015-0282(01)01771-X.
- Sunkara, S. K., Siozos, A., Bolton, V. N., Khalaf, Y., Braude, P. R., & El-Toukhy, T. (2010). The influence of delayed blastocyst formation on the outcome of frozen-thawed blastocyst transfer: A systematic review and meta-analysis. Human Reproduction, 25(8), 1906–1915. https://doi.org/https://doi.org/10.1093/humrep/deq143.
- Tiitinen, A., Halttunen, M., Harkki, P., Vuoristo, P., & Hyden-Granskog, C. (2001). Elective single embryo transfer: The value of cryopreservation. Human Reproduction, 16(6), 1140–1144. https://doi.org/https://doi.org/10.1093/humrep/16.6.1140.
- Veleva, Z., Karinen, P., Tomas, C., Tapanainen, J. S., & Martikainen, H. (2009). Elective single embryo transfer with cryopreservation improves the outcome and diminishes the costs of IVF/ICSI. Human Reproduction, 24(7), 1632–1639. https://doi.org/https://doi.org/10.1093/humrep/dep042.
- Wang, A., Kort, J., Behr, B., & Westphal, L. M. (2018). Euploidy in relation to blastocyst sex and morphology. Journal of Assisted Reproduction and Genetics, 35(9), 1565–1572. https://doi.org/https://doi.org/10.1007/s10815-018-1262-x.
- Wang, C., Feng, G., Zhang, B., Zhou, H., Shu, J., Lin, R., Chen, H., & Wu, Z. (2017). Effect of different artificial shrinkage methods, when applied before blastocyst vitrification, on perinatal outcomes. Reproductive Biology and Endocrinology, 15(1), 32. https://doi.org/https://doi.org/10.1186/s12958-017-0252-7.
- Wang, X., Zhen, J., Sun, Z., Yu, Q., Deng, C., Zhou, Y., Wang, H., & He, F. (2016). Effects of fifth day (D5) or sixth day (D6) frozen-thawed blastocysts on neonatal outcomes. Zygote, 24(5), 684–691. https://doi.org/https://doi.org/10.1017/S0967199415000696.
- Yang, H., Yang, Q., Dai, S., Li, G., Jin, H., Yao, G., & Sun, Y. (2016). Comparison of differences in development potentials between frozen-thawed D5 and D6 blastocysts and their relationship with pregnancy outcomes. Journal of Assisted Reproduction and Genetics, 33(7), 865–872. https://doi.org/https://doi.org/10.1007/s10815-016-0712-6.
- Zhang, H., Zhou, Y., Li, Y., Zheng, Y., Xiao, S., Wu, Y., Wang, H., & Huang, X. (2014). Prediction of clinical pregnancy in vitrified-warmed single blastocyst transfer cycles by pre-freeze morphology. Iranian Journal of Reproductive Medicine, 12(8), 567–572. http://journals.ssu.ac.ir/ijrmnew/article-1-568-en.html
- Zhang, W., Xiao, X., Zhang, J., Wang, W., Wu, J., Peng, L., & Wang, X. (2018). Clinical outcomes of frozen embryo versus fresh embryo transfer following in vitro fertilization: A meta-analysis of randomized controlled trials. Archives of Gynecology and Obstetrics, 298(2), 259–272. https://doi.org/https://doi.org/10.1007/s00404-018-4786-5.