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 2.  Alteri A, Arroyo G, Baccino G, et al. ESHRE guideline: number of embryos to transfer during IVF/ICSI † ESHRE Guideline Group on the Number of Embryos to. Published online 2024. doi:10.1093/humrep/deae010

3. Guidance on the limits to the number of embryos to transfer: a committee opinion. Fertil Steril. 2021;116(3):651-654. doi:10.1016/j.fertnstert.2021.06.050

4  .Gerris JMR. Single embryo transfer and IVF/ICSI outcome: A balanced appraisal. Hum Reprod Update. 2005;11(2):105-121. doi:10.1093/humupd/dmh049

5. Wyns C, De Geyter C, Calhaz-Jorge C, et al. ART in Europe, 2017: Results generated from European registries by ESHRE. Hum Reprod Open. 2021;2021(3). doi:10.1093/hropen/hoab026

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7. Forman EJ, Hong KH, Ferry KM, et al. In vitro fertilization with single euploid blastocyst transfer: A randomized controlled trial. Fertil Steril. 2013;100(1). doi:10.1016/j.fertnstert.2013.02.056

8. Grifo JA, Hodes-Wertz B, Lee HL, Amperloquio E, Clarke-Williams M, Adler A. Single thawed euploid embryo transfer improves IVF pregnancy, miscarriage, and multiple gestation outcomes and has similar implantation rates as egg donation. J Assist Reprod Genet. 2013;30(2):259-264. doi:10.1007/s10815-012-9929-1

9. Tobias T, Sharara FI, Franasiak JM, Heiser PW, Pinckney-Clark E. Promoting the use of elective single embryo transfer in clinical practice. Fertil Res Pract. 2016;2(1). doi:10.1186/s40738-016-0024-7

10 . Gardner DK, Phil D, Surrey E, et al. Single blastocyst transfer: a prospective randomized trial. doi:10.1016/j.fertnstert.2003

11. Gerris J, De Neubourg D, Mangelschots K, Royen E Van, Van De Meerssche M, Valkenburg M. Prevention of Twin Pregnancy after In-Vitro Fertilization or Intracytoplasmic Sperm Injection Based on Strict Embryo Criteria: A Prospective Randomized Clinical Trial. Vol 14. Templeton and Morris; 1999.

12 . Martikainen H, Tiitinen A, Tomás C, et al. One versus Two Embryo Transfer after IVF and ICSI: A Randomized Study. Vol 16.; 2001.

13 . Moustafa MK, Sheded SA, El Aziz Mousta MA. Elective single embryo transfer versus double embryo transfer in assisted reproduction. Reprod Biomed Online. 2008;17(1):82-87. doi:10.1016/S1472-6483(10)60297-0

14 . Thurin A, Hausken J, Hillensjö T, et al. Elective Single-Embryo Transfer versus Double-Embryo Transfer in in Vitro Fertilization. www.nejm.org

15. Impact of Transferring a Poor Quality Embryo Along with a Good Quality Embryo on Pregnancy Outcomes in IVF:ICSI Cycles- a Retrospective Study.

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17. Wang W, Cai J, Liu L, et al. Does the transfer of a poor quality embryo with a good quality embryo benefit poor prognosis patients? Reproductive Biology and Endocrinology. 2020;18(1). doi:10.1186/s12958-020-00656-2

18. Park DS, Kim JW, Chang EM, Lee WS, Yoon TK, Lyu SW. Strategies in the transfer of varying grades of vitrified-warmed blastocysts in women aged over 35 years: A propensity-matched analysis. Journal of Obstetrics and Gynaecology Research. 2019;45(4):849-857. doi:10.1111/jog.13897

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20. Arab S, Badegiesh A, Aldhaheri S, Son WY, Dahan MH. What Are the Live Birth and Multiple Pregnancy Rates When 1 Versus 2 Low-Quality Blastocysts Are Transferred in a Cryopreserved Cycle? a Retrospective Cohort Study, Stratified for Age, Embryo Quality, and Oocyte Donor Cycles. Reproductive Sciences. 2021;28(5):1403-1411. doi:10.1007/s43032-020-00404-2

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22. Richter KS, Ginsburg DK, Shipley SK, et al. Factors associated with birth outcomes from cryopreserved blastocysts: experience from 4,597 autologous transfers of 7,597 cryopreserved blastocysts. In: Fertility and Sterility. Vol 106. Elsevier Inc.; 2016:354-362.e2. doi:10.1016/j.fertnstert.2016.04.022.

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27. Bhattacharya S, Maheshwari A, Mollison J. Factors associated with failed treatment: An analysis of 121,744 women embarking on their first IVF Cycles. PLoS One. 2013;8(12). doi:10.1371/journal.pone.0082249

28. Lintsen AME, Eijkemans MJC, Hunault CC, et al. Predicting ongoing pregnancy chances after IVF and ICSI: A national prospective study. Human Reproduction. 2007;22(9):2455-2462. doi:10.1093/humrep/dem183

29.  McLernon DJ, Steyerberg EW, Te Velde ER, Lee AJ, Bhattacharya S. Predicting the chances of a live birth after one or more complete cycles of in vitro fertilisation: Population based study of linked cycle data from 113 873 women. BMJ (Online). 2016;355. doi:10.1136/bmj.i5735

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58.  Alteri A, Arroyo G, Baccino G, et al. ESHRE guideline: number of embryos to transfer during IVF/ICSI † ESHRE Guideline Group on the Number of Embryos to. Published online 2024. doi:10.1093/humrep/deae010

59. Guidance on the limits to the number of embryos to transfer: a committee opinion. Fertil Steril. 2021;116(3):651-654. doi:10.1016/j.fertnstert.2021.06.050

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62. Gerris JMR. Single embryo transfer and IVF/ICSI outcome: A balanced appraisal. Hum Reprod Update. 2005;11(2):105-121. doi:10.1093/humupd/dmh049

63. Forman EJ, Hong KH, Ferry KM, et al. In vitro fertilization with single euploid blastocyst transfer: A randomized controlled trial. Fertil Steril. 2013;100(1). doi:10.1016/j.fertnstert.2013.02.056

64. Grifo JA, Hodes-Wertz B, Lee HL, Amperloquio E, Clarke-Williams M, Adler A. Single thawed euploid embryo transfer improves IVF pregnancy, miscarriage, and multiple gestation outcomes and has similar implantation rates as egg donation. J Assist Reprod Genet. 2013;30(2):259-264. doi:10.1007/s10815-012-9929-1

65. Gardner DK, Phil D, Surrey E, et al. Single blastocyst transfer: a prospective randomized trial. doi:10.1016/j.fertnstert.2003

66. Gerris J, De Neubourg D, Mangelschots K, Royen E Van, Van De Meerssche M, Valkenburg M. Prevention of Twin Pregnancy after In-Vitro Fertilization or Intracytoplasmic Sperm Injection Based on Strict Embryo Criteria: A Prospective Randomized Clinical Trial. Vol 14. Templeton and Morris; 1999.

67. Martikainen H, Tiitinen A, Tomás C, et al. One versus Two Embryo Transfer after IVF and ICSI: A Randomized Study. Vol 16.; 2001.

68. Moustafa MK, Sheded SA, El Aziz Mousta MA. Elective single embryo transfer versus double embryo transfer in assisted reproduction. Reprod Biomed Online. 2008;17(1):82-87. doi:10.1016/S1472-6483(10)60297-0

69.  Thurin A, Hausken J, Hillensjö T, et al. Elective Single-Embryo Transfer versus Double-Embryo Transfer in in Vitro Fertilization. www.nejm.org

70. Penzias A, Bendikson K, Butts S, et al. Guidance on the limits to the number of embryos to transfer: a committee opinion. Fertil Steril. 2017;107(4):901-903.

71. Engmann L, Maconochie N, Tan SL, Bekir J. Trends in the Incidence of Births and Multiple Births and the Factors That Determine the Probability of Multiple Birth after IVF Treatment. Vol 16.; 2001.

72. Kupka MS, Dorn C, Richter O, Felberbaum R, Van Der Ven H. Impact of reproductive history on in vitro fertilization and intracytoplasmic sperm injection outcome: evidence from the German IVF Registry. doi:10.1016/S0015-0282(03)

73. Molloy D, Doody ML, Breen T. Second time around: A study of patients seeking second assisted reproduction pregnancies. Fertil Steril. 1995;64(3):546-551. doi:10.1016/s0015-0282(16)57790-5

74. Simon A, Ronit C, Lewin A, Mordel N, Zajicek G, Laufer N. Conception rate after in vitro fertilization in patients who conceived in a previous cycle. Fertil Steril. 1993;59(2):343-347. doi:10.1016/S0015-0282(16)55672-6

75. Bhattacharya S, Maheshwari A, Mollison J. Factors associated with failed treatment: An analysis of 121,744 women embarking on their first IVF Cycles. PLoS One. 2013;8(12). doi:10.1371/journal.pone.0082249

76.  Lintsen AME, Eijkemans MJC, Hunault CC, et al. Predicting ongoing pregnancy chances after IVF and ICSI: A national prospective study. Human Reproduction. 2007;22(9):2455-2462. doi:10.1093/humrep/dem183

77. McLernon DJ, Steyerberg EW, Te Velde ER, Lee AJ, Bhattacharya S. Predicting the chances of a live birth after one or more complete cycles of in vitro fertilisation: Population based study of linked cycle data from 113 873 women. BMJ (Online). 2016;355. doi:10.1136/bmj.i5735

78. Roberts SA, Hirst WM, Brison DR, Vail A. Embryo and uterine influences on IVF outcomes: An analysis of a UK multi-centre cohort. Human Reproduction. 2010;25(11):2792-2802. doi:10.1093/humrep/deq213