1. Ming L, Liu P, Qiao J, Lian Y, Zheng X, Ren X, et al. Synchronization between embryo development and endometrium is a contributing factor for rescue ICSI outcome. Reprod Biomed Online. 2012;24:527–31.
2. Combelles CM, Morozumi K, Yanagimachi R, Zhu L, Fox JH, Racowsky C. Diagnosing cellular defects in an unexplained case of total fertilization failure. Hum Reprod. 2010;25:1666–71.
3. Shalom-paz E, Alshalati J, Shehata F, Jimenez L, Son WY, Holzer H, et al. Clinical and economic analysis of rescue intracytoplasmic sperm injection cycles. Gynecol Endocrinol. 2011;27:993–6.
4. Kuczynski W, Dhont M, Grygoruk C, Pietrewicz P, Redzko S, Szamatowicz M. Rescue ICSI of unfertilized oocytes after IVF. Hum Reprod. 2002;17:2423–7.
5. Plachot M, Junca AM, Mandelbaum J, Cohen J, Salat-Baroux J, Da Lage C. Timing of in-vitro fertilization of cumulus-free and cumulus-enclosed human oocytes. Hum Reprod. 1986;1:237–42.
6. Chen C, Sathananthan AH. Early penetration of human sperm through the vestments of human eggs in vitro. Arch Androl. 1986;16:183–97.
7. Payne D, Flaherty SP, Barry MF, Matthews CD. Preliminary observations on polar body extrusion and pronuclear formation in human oocytes using time-lapse video cinematography. Hum Reprod. 1997;12:532–41.
8. Liu J, Zhang X, Yang Y, Zhao J, Hao D, Zhang J, et al. Long-time vs. short-time insemination of sibling eggs. Exp Ther Med. 2016;12:3756–60.
9. Nagy ZP, Rienzi LF, Ubaldi FM, Greco E, Massey JB, Kort HI. Effect of reduced oocyte aging on the outcome of rescue intracytoplasmic sperm injection. Fertil Steril. 2006;85:901–6.
10. Chen C, Kattera S. Rescue ICSI of oocytes that failed to extrude the second polar body 6 h post-insemination in conventional IVF. Hum Reprod. 2003;18:2118–21.
11. Liu W, Liu J, Zhang X, Han W, Xiong S, Huang G. Short co-incubation of gametes combined with early rescue ICSI: an optimal strategy for complete fertilization failure after IVF. Hum Fertil (Camb). 2014;17:50–5.
12. Kattera S, Chen C. Short coincubation of gametes in in vitro fertilization improves implantation and pregnancy rates: a prospective, randomized, controlled study. Fertil Steril. 2003;80:1017–21.
13. Le Bras A, Hesters L, Gallot V, Tallet C, Tachdjian G, Frydman N. Shortening gametes co-incubation time improves live birth rate for couples with a history of fragmented embryos. Syst Biol Reprod Med. 2017;63:331–7.
14. Xiong S, Han W, Liu JX, Zhang XD, Liu WW, Liu H, et al. Effects of cumulus cells removal after 6 h co-incubation of gametes on the outcomes of human IVF. J Assist Reprod Genet. 2011;28:1205–11.
15. Xue Y, Tong X, Jiang L, Zhu H, Yang L, Zhang S. Effect of cumulus cell removal 4 h post-insemination on fertilization and embryo quality: a prospective randomized sibling-oocyte study. J Assist Reprod Genet. 2013;30:1049–53.
16. Jin HX, Xin ZM, Song WY, Dai SJ, Sun YP. Effects of human cumulus cells on in vitro fertilization outcomes and its significance in short-term insemination. J Reprod Med. 2013;58:51–4.
17. Zhou L, Wang J, Xiao L, Sun H, Wang Y, Geng L, et al. Differential effects of short co-incubation of gametes and early removal of cumulus cells in patients with different fertilizing capabilities. Reprod Biomed Online. 2016;32:591–6.
18. Xiang W, Cong F, Lei JIA. Impact of Early Removal of Cumulus Cells from Cumulus-oocyteComplexes after Short-term Insemination on Embryo Qualityand Pregnant Outcome. JOURNAL OF SUN YAT-SEN UNIVERSITY (MEDICAL SCIENCES). 2014;35:390.
19. Hershlag A, Paine T, Kvapil G, Feng H, Napolitano B. In vitro fertilization-intracytoplasmic sperm injection split: an insemination method to prevent fertilization failure. Fertil Steril. 2002;77:229–32.
20. Goswami G, Gouri MD. Relevance of Split In vitro Fertilization-Intracytoplasmic Sperm Injection Method of Insemination in Normozoospermic and Mildly Oligospermic Men: A Retrospective Study. J Hum Reprod Sci. 2020;13:145–9.
21. Practice Committees of the American Society for Reproductive M, the Society for Assisted Reproductive Technology. Electronic address asrm asrm org. Intracytoplasmic sperm injection (ICSI) for non-male factor indications: a committee opinion. Fertil Steril. 2020;114:239–45.
22. Moawad A, Abou-Ria c H, Elzaher d MA, Mohamed a. Split ICSI/Insemination in Mild Male Factor Infertility: a Randomized Controlled Trial. Egyptian Journal of Hospital Medicine [Internet]. 2011; Available from: http://egyptianjournal.net78.net/43_2.pdf
23. Hwang JL, Seow KM, Lin YH, Hsieh BC, Huang LW, Chen HJ, et al. IVF versus ICSI in sibling oocytes from patients with polycystic ovarian syndrome: a randomized controlled trial. Hum Reprod. 2005;20:1261–5.
24. Sauerbrun-Cutler MT, Huber WJ, Has P, Shen C, Hackett R, Alvero R, et al. Is intracytoplasmic sperm (ICSI) better than traditional in vitro fertilization (IVF): confirmation of higher blastocyst rates per oocyte using a split insemination design. J Assist Reprod Genet. 2020;37:1661–7.
25. Heikinheimo O, Bitzer J, Garcia Rodriguez L. Real-world research and the role of observational data in the field of gynaecology - a practical review. Eur J Contracept Reprod Health Care. 2017;22:250–9.
26. Harris AL, Vanegas JC, Hariton E, Bortoletto P, Palmor M, Humphries LA, et al. Semen parameters on the day of oocyte retrieval predict low fertilization during conventional insemination IVF cycles. J Assist Reprod Genet. 2019;36:291–8.
27. Montag M, Koster M, van der Ven K, Bohlen U, van der Ven H. The benefit of artificial oocyte activation is dependent on the fertilization rate in a previous treatment cycle. Reprod Biomed Online. 2012;24:521–6.
28. Alpha Scientists in Reproductive M, Embryology ESIG of. The Istanbul consensus workshop on embryo assessment: proceedings of an expert meeting. Hum Reprod. 2011;26:1270–83.
29. Chen-hui D, Jing W, Si-da WEI, Yan-wen XU, Can-quan Z. Effects of Early Cumulus Cells Removal on In Vitro Fertilization in Short-Term Insemination. JOURNAL OF SUN YAT-SEN UNIVERSITY (MEDICAL SCIENCES). 2016;37:71.
30. He Y, Liu H, Zheng H, Li L, Fu X, Liu J. Effect of early cumulus cells removal and early rescue ICSI on pregnancy outcomes in high-risk patients of fertilization failure. Gynecol Endocrinol. 2018;34:689–93.
31. Kong P, Yin M, Tang C, Zhu X, Bukulmez O, Chen M, et al. Effects of Early Cumulus Cell Removal on Treatment Outcomes in Patients Undergoing In Vitro Fertilization: A Retrospective Cohort Study. Front Endocrinol (Lausanne). 2021;12:669507.
32. Huang B, Qian K, Li Z, Yue J, Yang W, Zhu G, et al. Neonatal outcomes after early rescue intracytoplasmic sperm injection: an analysis of a 5-year period. Fertil Steril. 2015;103:1432-7 e1.
33. Xiong F, Sun Q, Li G, Yao Z, Chen P, Wan C, et al. Perinatal and neonatal outcomes of pregnancies after early rescue intracytoplasmic sperm injection in women with primary infertility compared with conventional intracytoplasmic sperm injection: a retrospective 6-year study. BMC Pregnancy Childbirth. 2020;20:460.
34. Vitek WS, Galarraga O, Klatsky PC, Robins JC, Carson SA, Blazar AS. Management of the first in vitro fertilization cycle for unexplained infertility: a cost-effectiveness analysis of split in vitro fertilization-intracytoplasmic sperm injection. Fertil Steril. 2013;100:1381–8.
35. Esteves SC, Roque M, Bedoschi G, Haahr T, Humaidan P. Intracytoplasmic sperm injection for male infertility and consequences for offspring. Nat Rev Urol. 2018;15:535–62.
36. Pereira N, O’Neill C, Lu V, Rosenwaks Z, Palermo GD. The safety of intracytoplasmic sperm injection and long-term outcomes. Reproduction. 2017;154:F61–70.