Day 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program

Abstract The superiority of day 5 blastocysts compared to day 6 blastocysts in fresh cycle transfers was previously demonstrated and attributed mainly to endometrial asynchrony. Data from frozen blastocysts transfers showed conflicting results, possibly due to heterogeneous patient population and em...

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Autores principales:	G. M. Yerushalmi, T. Shavit, S. Avraham, M. Youngster, A. Kedem, I. Gat, U. S. Dorofeyeva, S. Mashiach, E. Schiff, A. Shulman, D. S. Seidman, A. Wiser, E. Maman, A. Hourvitz, M. Baum
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1e3751b7bd60422ebc715439d4329fd2
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spelling	oai:doaj.org-article:1e3751b7bd60422ebc715439d4329fd22021-12-02T16:49:46ZDay 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program10.1038/s41598-021-90238-y2045-2322https://doaj.org/article/1e3751b7bd60422ebc715439d4329fd22021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90238-yhttps://doaj.org/toc/2045-2322Abstract The superiority of day 5 blastocysts compared to day 6 blastocysts in fresh cycle transfers was previously demonstrated and attributed mainly to endometrial asynchrony. Data from frozen blastocysts transfers showed conflicting results, possibly due to heterogeneous patient population and embryo quality. The aim of this study was to compare clinical pregnancy rate (CPR) and live birth rate (LBR) between transfers of vitrified day 5 blastocysts and day 6 blastocysts in oocyte donation, blastocyst-only cycles. In a retrospective, multi-center study, with a single oocyte donation program, a total of 1840 frozen embryo transfers (FET’s) were analyzed, including 1180 day 5 blastocysts and 660 day 6 blastocysts transfers. Day 5 blastocyst transfers had better embryonic development and significantly higher CPRs (34.24% vs. 20.15%, P < 0.0001), higher LBRs (26.89% vs. 14.77%, P < 0.0001), less cycles to LBR (1.83 ± 0.08 vs. 2.39 ± 0.18, P = 0.003) and shorter time to LBRs (76.32 ± 8.7 vs. 123.24 ± 19.1 days, P = 0.01), compared to day 6 transfers, respectively. A multivariate stepwise logistic regression indicated, that day 5 transfer was an independent factor for CPRs (OR 1.91; 95% CI 1.43–2.54, P < 0.001) and LBRs (OR 2.26; 95% CI 1.19–4.28, P = 0.01), regardless of embryo quality, compared to day 6. In conclusion, day 5 blastocysts in oocyte donation program have significantly higher CPRs and LBRs, and present shorter time to delivery, compared to day 6 blastocysts, regardless of embryo quality.G. M. YerushalmiT. ShavitS. AvrahamM. YoungsterA. KedemI. GatU. S. DorofeyevaS. MashiachE. SchiffA. ShulmanD. S. SeidmanA. WiserE. MamanA. HourvitzM. BaumNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q G. M. Yerushalmi T. Shavit S. Avraham M. Youngster A. Kedem I. Gat U. S. Dorofeyeva S. Mashiach E. Schiff A. Shulman D. S. Seidman A. Wiser E. Maman A. Hourvitz M. Baum Day 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program
description	Abstract The superiority of day 5 blastocysts compared to day 6 blastocysts in fresh cycle transfers was previously demonstrated and attributed mainly to endometrial asynchrony. Data from frozen blastocysts transfers showed conflicting results, possibly due to heterogeneous patient population and embryo quality. The aim of this study was to compare clinical pregnancy rate (CPR) and live birth rate (LBR) between transfers of vitrified day 5 blastocysts and day 6 blastocysts in oocyte donation, blastocyst-only cycles. In a retrospective, multi-center study, with a single oocyte donation program, a total of 1840 frozen embryo transfers (FET’s) were analyzed, including 1180 day 5 blastocysts and 660 day 6 blastocysts transfers. Day 5 blastocyst transfers had better embryonic development and significantly higher CPRs (34.24% vs. 20.15%, P < 0.0001), higher LBRs (26.89% vs. 14.77%, P < 0.0001), less cycles to LBR (1.83 ± 0.08 vs. 2.39 ± 0.18, P = 0.003) and shorter time to LBRs (76.32 ± 8.7 vs. 123.24 ± 19.1 days, P = 0.01), compared to day 6 transfers, respectively. A multivariate stepwise logistic regression indicated, that day 5 transfer was an independent factor for CPRs (OR 1.91; 95% CI 1.43–2.54, P < 0.001) and LBRs (OR 2.26; 95% CI 1.19–4.28, P = 0.01), regardless of embryo quality, compared to day 6. In conclusion, day 5 blastocysts in oocyte donation program have significantly higher CPRs and LBRs, and present shorter time to delivery, compared to day 6 blastocysts, regardless of embryo quality.
format	article
author	G. M. Yerushalmi T. Shavit S. Avraham M. Youngster A. Kedem I. Gat U. S. Dorofeyeva S. Mashiach E. Schiff A. Shulman D. S. Seidman A. Wiser E. Maman A. Hourvitz M. Baum
author_facet	G. M. Yerushalmi T. Shavit S. Avraham M. Youngster A. Kedem I. Gat U. S. Dorofeyeva S. Mashiach E. Schiff A. Shulman D. S. Seidman A. Wiser E. Maman A. Hourvitz M. Baum
author_sort	G. M. Yerushalmi
title	Day 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program
title_short	Day 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program
title_full	Day 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program
title_fullStr	Day 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program
title_full_unstemmed	Day 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program
title_sort	day 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1e3751b7bd60422ebc715439d4329fd2
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Day 5 vitrified blastocyst transfer versus day 6 vitrified blastocyst transfer in oocyte donation program

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