Patrizio P, Sakkas D. From oocyte to baby: a clinical evaluation of the biological efficiency of in vitro fertilization. Fertil Steril. 2009;91:1061–6 (https://www.sciencedirect.com/science/article/pii/S0015028208000253).

Article  PubMed  Google Scholar 

Awadalla M, Kim A, Vestal N, Ho J, Bendikson K. Effect of age and embryo morphology on live birth rate after transfer of unbiopsied blastocysts. JBRA Assist Reprod. 2021;25:373–82.

PubMed  PubMed Central  Google Scholar 

de Carvalho BR, Barbosa MWP, Bonesi H, Sobrinho Gomes DB, Cabral ÍO, Barbosa ACP, et al. Embryo stage of development is not decisive for reproductive outcomes in frozen-thawed embryo transfer cycles. JBRA Assist Reprod. 2017;21:23–6 (https://pubmed.ncbi.nlm.nih.gov/28333028).

Article  PubMed  PubMed Central  Google Scholar 

Glujovsky D, Quinteiro Retamar A, Alvarez Sedo C, Ciapponi A, Cornelisse S, Blake D. Cleavage‐stage versus blastocyst‐stage embryo transfer in assisted reproductive technology. Cochrane Database Syst Rev 2022. https://doi.org/10.1002/14651858.CD002118.pub6

Maheshwari A, Pandey S, Shetty A, Hamilton M, Bhattacharya S. Fertil Steril. 2012;98:368-377.e9. https://doi.org/10.1016/j.fertnstert.2012.05.019.

Article  PubMed  Google Scholar 

Saket Z, Kallen K, Lundin K, Magnusson Å, Bergh C. P–767 Cumulative live birth rate after IVF - trend over time and the impact of blastocyst culture and vitrification. Hum Reprod. 2021;36(130):766. https://doi.org/10.1093/humrep/deab130.766.

Article  Google Scholar 

Ashrafi M, Jahangiri N, Hassani F, Akhoond MR, Madani T. The factors affecting the outcome of frozen–thawed embryo transfer cycle. Taiwan J Obstet Gynecol. 2011;50:159–64 (https://www.sciencedirect.com/science/article/pii/S1028455911000684).

Article  PubMed  Google Scholar 

Roque M, Haahr T, Geber S, Esteves SC, Humaidan P. Fresh versus elective frozen embryo transfer in IVF, ICSI cycles: a systematic review and meta-analysis of reproductive outcomes. Hum Reprod Update. 2019;25:2–14. https://doi.org/10.1093/humupd/dmy033.

Article  PubMed  Google Scholar 

Wong KM, van Wely M, Verhoeve HR, Kaaijk EM, Mol F, van der Veen F, et al. Transfer of fresh or frozen embryos: a randomised controlled trial. Hum Reprod. 2021;36:998–1006. https://doi.org/10.1093/humrep/deaa305.

Article  CAS  PubMed  PubMed Central  Google Scholar 

Verberg MFG, Eijkemans MJC, Macklon NS, Heijnen EMEW, Baart EB, Hohmann FP, et al. The clinical significance of the retrieval of a low number of oocytes following mild ovarian stimulation for IVF: a meta-analysis. Hum Reprod Update. 2009;15:5–12. https://doi.org/10.1093/humupd/dmn053.

Article  CAS  PubMed  Google Scholar 

Milachich T, Shterev A. Are there optimal numbers of oocytes, spermatozoa and embryos in assisted reproduction? JBRA Assist Reprod. 2016;20:142–9 (https://pubmed.ncbi.nlm.nih.gov/27584608).

Article  PubMed  PubMed Central  Google Scholar 

Brinsden PR, Wada I, Tan SL, Balen A, Jacobs HS. Diagnosis, prevention and management of ovarian hyperstimulation syndrome. BJOG Int J Obstet Gynaecol. 1995;102:767–72. https://doi.org/10.1111/j.1471-0528.1995.tb10840.x.

Article  CAS  Google Scholar 

Delvigne A, Rozenberg S. Review of clinical course and treatment of ovarian hyperstimulation syndrome (OHSS). Hum Reprod Update. 2003;9:77–96. https://doi.org/10.1093/humupd/dmg005.

Article  CAS  PubMed  Google Scholar 

Veleva Z, Orava M, Nuojua-Huttunen S, Tapanainen JS, Martikainen H. Factors affecting the outcome of frozen–thawed embryo transfer. Hum Reprod. 2013;28:2425–31. https://doi.org/10.1093/humrep/det251.

Article  PubMed  Google Scholar 

The ESHRE guideline group on the number of embryos to transfer during IVF/ICSI. Evidence-based guideline: number of embryos to transfer. [Internet]. 2023. Available from: https://www.eshre.eu/Guidelines-and-Legal/Guidelines/Embryo-transfer.

Bosdou JK, Venetis CA, Tarlatzis BC, Grimbizis GF, Kolibianakis EM. Higher probability of live-birth in high, but not normal, responders after first frozen-embryo transfer in a freeze-only cycle strategy compared to fresh-embryo transfer: a meta-analysis. Hum Reprod. 2019;34:491–505. https://doi.org/10.1093/humrep/dey388.

Article  CAS  PubMed  Google Scholar 

Zaat T, Zagers M, Mol F, Goddijn M, van Wely M, Mastenbroek S. Fresh versus frozen embryo transfers in assisted reproduction. Cochrane Database Syst Rev. 2021;2:CD011184.

PubMed  Google Scholar 

Machado C. The fate of surplus embryos: ethical and emotional impacts on assisted reproduction. JBRA Assist Reprod. 2020;24(3):310.

PubMed  PubMed Central  Google Scholar 

Berin I, McLellan ST, Macklin EA, Toth TL, Wright DL. Frozen-thawed embryo transfer cycles: clinical outcomes of single and double blastocyst transfers. J Assist Reprod Genet. 2011;28:575–81 (https://pubmed.ncbi.nlm.nih.gov/21373800).

Article  PubMed  PubMed Central  Google Scholar 

Freeman MR, Hinds MS, Howard KG, Howard JM, Hill GA. Guidance for elective single-embryo transfer should be applied to frozen embryo transfer cycles. J Assist Reprod Genet. 2019;36:939–46 (https://pubmed.ncbi.nlm.nih.gov/30859416).

Article  PubMed  PubMed Central  Google Scholar 

Bdolah Y, Zemet R, Aizenman E, Lossos F, Abram T, Shufaro Y. Frozen-thawed embryo transfer success rate is affected by age and ovarian response at oocyte aspiration regardless of blastomere survival rate. JBRA Assist Reprod. 2015;19(4):210–5.

Article  PubMed  Google Scholar 

Kassab A, Sabatini L, Tozer A, Zosmer A, Mostafa M, Al-Shawaf T. The correlation between basal serum follicle-stimulating hormone levels before embryo cryopreservation and the clinical outcome of frozen embryo transfers. Fertil Steril. 2009;92:1269–75. https://doi.org/10.1016/j.fertnstert.2008.08.077.

Article  CAS  PubMed  Google Scholar 

Bushaqer NJ, Alkhudhairy NN, Alturaigi ZM, Alhamad RM, Mohawesh WA, Alraka FE, et al. The effect of fresh IVF cycle characteristics on frozen embryo transfer (FET) outcomes. JBRA Assist Reprod. 2020;24:135–42 (https://pubmed.ncbi.nlm.nih.gov/32072802).

PubMed  PubMed Central  Google Scholar 

Zargar M, Dehdashti S, Najafian M, Choghakabodi PM. Pregnancy outcomes following in vitro fertilization using fresh or frozen embryo transfer. JBRA Assist Reprod. 2021;25:570–4 (https://pubmed.ncbi.nlm.nih.gov/34224240).

PubMed  PubMed Central  Google Scholar 

Doherty LF, Martin JR, Kayisli U, Sakkas D, Patrizio P. Fresh transfer outcome predicts the success of a subsequent frozen transfer utilizing blastocysts of the same cohort. Reprod Biomed Online. 2014;28:204–8. https://doi.org/10.1016/j.rbmo.2013.09.030.

Article  CAS  PubMed  Google Scholar 

ESHRE Guideline Group on Good Practice in IVF Labs, et al. Revised guidelines for good practice in IVF laboratories (2015)†. Hum Reprod. 2016;31:685–6. https://doi.org/10.1093/humrep/dew016.

Rienzi L, Gracia C, Maggiulli R, LaBarbera AR, Kaser DJ, Ubaldi FM, et al. Oocyte, embryo and blastocyst cryopreservation in ART: systematic review and meta-analysis comparing slow-freezing versus vitrification to produce evidence for the development of global guidance. Hum Reprod Update. 2017;23:139–55. https://doi.org/10.1093/humupd/dmw038.

Article  CAS  PubMed  Google Scholar 

Li J, Lin J, Yin M, Zhu Q, Kuang Y. The live birth and neonatal outcomes in the subsequent pregnancy among patients with adverse pregnancy outcomes in first frozen embryo transfer cycles. Arch Gynecol Obstet. 2020;302:731–40. https://doi.org/10.1007/s00404-020-05608-0.

Article  PubMed  Google Scholar 

Alpha Scientists in Reproductive Medicine and ESHRE Special Interest Group of Embryology. The Istanbul consensus workshop on embryo assessment: proceedings of an expert meeting†. Hum Reprod. 2011;26:1270–83. https://doi.org/10.1093/humrep/der037.

Article  Google Scholar 

Gardner DK, Lane M, Stevens J, Schlenker T, Schoolcraft WB. Blastocyst score affects implantation and pregnancy outcome: towards a single blastocyst transfer. Fertil Steril. 2000;73:1155–8 (https://www.sciencedirect.com/science/article/pii/S0015028200005185).

Article  CAS  PubMed  Google Scholar 

Ebner T, Oppelt P, Radler E, Allerstorfer C, Habelsberger A, Mayer RB, et al. Morphokinetics of vitrified and warmed blastocysts predicts implantation potential. J Assist Reprod Genet. 2017;34:239–44. https://doi.org/10.1007/s10815-016-0855-5.

Article  CAS  PubMed  Google Scholar 

Polyzos NP, Drakopoulos P, Parra J, Pellicer A, Santos-Ribeiro S, Tournaye H, et al. Cumulative live birth rates according to the number of oocytes retrieved after the first ovarian stimulation for in vitro fertilization/intracytoplasmic sperm injection: a multicenter multinational analysis including ∼15,000 women. Fertil Steril. 2018;110:661-670.e1. https://doi.org/10.1016/j.fertnstert.2018.04.039.

Article  PubMed