Abstract
Purpose
To investigate the feasibility of the application of conventional in vitro fertilization (cIVF) for couples undergoing preimplantation genetic testing for aneuploidies (PGT-A) with non-male factor infertility.
Methods
To evaluate the efficiency of sperm whole-genome amplification (WGA), spermatozoa were subjected to three WGA protocols: Picoplex, ChromInst, and multiple displacement amplification (MDA). In the clinical studies, 641 couples who underwent PGT-A treatment for frozen embryos between January 2016 and December 2021 were included to retrospectively compare the chromosomal and clinical outcomes of cIVF and intracytoplasmic sperm injection (ICSI). Twenty-six couples were prospectively recruited for cIVF and PGT-A treatment between April 2021 and April 2022; parental contamination was analyzed in biopsied samples; and 12 aneuploid embryos were donated to validate the PGT-A results.
Results
Sperm DNA failed to amplify under Picoplex and ChromInst conditions but could be amplified using MDA. In frozen PGT-A cycles, no significant differences in the average rates of euploid, mosaic, and aneuploid embryos per cycle between the cIVF-PGT-A and ICSI-PGT-A groups were observed. The results of the prospective study that recruited couples for cIVF-PGT-A treatment showed no paternal contamination and one case of maternal contamination in 150 biopsied trophectoderm samples. Among the 12 donated embryos with whole-chromosome aneuploidy, 11 (91.7%) presented uniform chromosomal aberrations, which were in agreement with the original biopsy results.
Conclusions
Under the Picoplex and ChromInst WGA protocols, the risk of parental contamination in the cIVF-PGT-A cycles was low. Therefore, applying cIVF to couples with non-male factor infertility who are undergoing PGT-A is feasible.
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Data availability
All data used and/or analyzed in this manuscript are available from the corresponding authors upon reasonable request.
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Acknowledgements
We thank all the patients who participated in this study. We are grateful to Lu Tan and other staff members of the PGT and IVF groups at CITIC-Xiangya for their assistance.
Funding
This study was supported by the Hunan Provincial Grant for Innovative Province Construction (2019SK4012).
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YY, AW, DZ, and SL were employed by Yikon Genomics Company, Ltd. The authors declare no conflict of interest.
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Zhang, S., Xie, P., Lan, F. et al. Conventional IVF is feasible in preimplantation genetic testing for aneuploidy. J Assist Reprod Genet 40, 2333–2342 (2023). https://doi.org/10.1007/s10815-023-02916-7
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DOI: https://doi.org/10.1007/s10815-023-02916-7