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Thaw, biopsy and refreeze strategy for PGT-A on previously cryopreserved embryos

BACKGROUND: Preimplantation genetic testing for aneuploidy (PGT-A) with Next Generation Sequencing technology is a low-cost and powerful technology for the analysis of embryo quality. However, PGT-A requires freezing of embryos, suggesting that previously cryopreserved embryos cannot be tested. Here...

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Autores principales: Wilding, M, Terribile, M, Parisi, I, Nargund, G
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Universa Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7020945/
https://www.ncbi.nlm.nih.gov/pubmed/32082528
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author Wilding, M
Terribile, M
Parisi, I
Nargund, G
author_facet Wilding, M
Terribile, M
Parisi, I
Nargund, G
author_sort Wilding, M
collection PubMed
description BACKGROUND: Preimplantation genetic testing for aneuploidy (PGT-A) with Next Generation Sequencing technology is a low-cost and powerful technology for the analysis of embryo quality. However, PGT-A requires freezing of embryos, suggesting that previously cryopreserved embryos cannot be tested. Here, we test whether use of the vitrification technique permits the refreezing of embryos, thus permitting PGT-A testing of cryopreserved embryos. METHODS: The results are a retrospective analysis of cases performed at Create fertility between 2016 and 2017. Results obtained after traditional PGT-A are compared with results after the thaw biopsy and refreeze (TBR) procedure. A total of 220 patients were treated with PGT-A and 54 patients with the TBR procedure. RESULTS: Maternal ages were not significantly different between the groups. The proportion of PGT-A normal embryos was not significantly different between the two groups. A clinical pregnancy rate of 61.5% was achieved with the PGT-A group and 52.4% with the TBR group. These results were not statistically significant. The efficiency of the thaw, biopsy and refreeze technique was not significantly different to that of fresh cycles for rates of survival, results obtained and aneuploidy incidence. Clinical pregnancy rates are not significantly different after the biopsy of fresh and previously cryopreserved embryos. CONCLUSION: The data shows that the TBR procedure has an equivalent success rate to that of classical PGT-A procedures.
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spelling pubmed-70209452020-02-20 Thaw, biopsy and refreeze strategy for PGT-A on previously cryopreserved embryos Wilding, M Terribile, M Parisi, I Nargund, G Facts Views Vis Obgyn Original Paper BACKGROUND: Preimplantation genetic testing for aneuploidy (PGT-A) with Next Generation Sequencing technology is a low-cost and powerful technology for the analysis of embryo quality. However, PGT-A requires freezing of embryos, suggesting that previously cryopreserved embryos cannot be tested. Here, we test whether use of the vitrification technique permits the refreezing of embryos, thus permitting PGT-A testing of cryopreserved embryos. METHODS: The results are a retrospective analysis of cases performed at Create fertility between 2016 and 2017. Results obtained after traditional PGT-A are compared with results after the thaw biopsy and refreeze (TBR) procedure. A total of 220 patients were treated with PGT-A and 54 patients with the TBR procedure. RESULTS: Maternal ages were not significantly different between the groups. The proportion of PGT-A normal embryos was not significantly different between the two groups. A clinical pregnancy rate of 61.5% was achieved with the PGT-A group and 52.4% with the TBR group. These results were not statistically significant. The efficiency of the thaw, biopsy and refreeze technique was not significantly different to that of fresh cycles for rates of survival, results obtained and aneuploidy incidence. Clinical pregnancy rates are not significantly different after the biopsy of fresh and previously cryopreserved embryos. CONCLUSION: The data shows that the TBR procedure has an equivalent success rate to that of classical PGT-A procedures. Universa Press 2020-01-24 /pmc/articles/PMC7020945/ /pubmed/32082528 Text en Copyright © 2019 Facts, Views & Vision http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Paper
Wilding, M
Terribile, M
Parisi, I
Nargund, G
Thaw, biopsy and refreeze strategy for PGT-A on previously cryopreserved embryos
title Thaw, biopsy and refreeze strategy for PGT-A on previously cryopreserved embryos
title_full Thaw, biopsy and refreeze strategy for PGT-A on previously cryopreserved embryos
title_fullStr Thaw, biopsy and refreeze strategy for PGT-A on previously cryopreserved embryos
title_full_unstemmed Thaw, biopsy and refreeze strategy for PGT-A on previously cryopreserved embryos
title_short Thaw, biopsy and refreeze strategy for PGT-A on previously cryopreserved embryos
title_sort thaw, biopsy and refreeze strategy for pgt-a on previously cryopreserved embryos
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7020945/
https://www.ncbi.nlm.nih.gov/pubmed/32082528
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