2007
DOI: 10.1274/jmor.24.23
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Re-cryopreservation by Vitrification of Human Blastocysts Developed from Frozen-Cleaved Embryos: A Report of 15 Cyclesa

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Cited by 13 publications
(9 citation statements)
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“…On the other hand, the present study indicated that half of zona pellucida thinning using laser before vitrified-warmed embryo transfer could significantly improve the rates of pregnancy and implantation compared with quarter thinning. Furthermore, in our previous study, the resistance to enzymatic removal of zona pellucida of vitrified-warmed blastocysts (120.4±10.2s) [27] significantly increased compared with blastocysts developed from frozen-thawed cleavage-stage embryos (104.9±10.1s) [14]. These observations suggest that more zona pellucida hardening can occur after vitrification process compared with slow-freezing process.…”
Section: Discussionmentioning
confidence: 71%
“…On the other hand, the present study indicated that half of zona pellucida thinning using laser before vitrified-warmed embryo transfer could significantly improve the rates of pregnancy and implantation compared with quarter thinning. Furthermore, in our previous study, the resistance to enzymatic removal of zona pellucida of vitrified-warmed blastocysts (120.4±10.2s) [27] significantly increased compared with blastocysts developed from frozen-thawed cleavage-stage embryos (104.9±10.1s) [14]. These observations suggest that more zona pellucida hardening can occur after vitrification process compared with slow-freezing process.…”
Section: Discussionmentioning
confidence: 71%
“…Therefore, with the improvement of the technology, multiple cryopreservation of human embryos has been contributing to the treatment availability in human assisted reproductive technology [22][23][24][25][26][27][28][29][30]. Primary vitrification was performed at the cleavage stage on day 3 and secondary vitrification was done at the hatched blastocyst stage on day 7.…”
Section: Discussionmentioning
confidence: 99%
“…Los resultados de re-vitrificación son similares a los reportados en embriones de ratón en clivaje utilizando la técnica del Cryoloop (Sheehan et al, 2006) y concuerdan con antecedentes de embarazos y nacimientos exitosos en casos clínicos (Hashimoto et al, 2007;Hiraoka et al, 2006;Hiraoka et al, 2007;Hiraoka et al, 2009;Kumasako et al, 2009;Mauri et al, 2010Mauri et al, , Özmen et al, 2006Son, 2005;Takahashi y Araki, 2004;Yokota et al, 2001) y a los de varios autores que han reportado que la vitrificación es una técnica que genera resultados consistentes y exitosos tanto en óvulos como en embriones ( Sheehan et al, 2006;Cobo et al, 2010;Lane et al, 1999). Recientemente se demostró que la congelación no aumenta las aneuploidías, sino que más bien la congelación y la re-congelación disminuyen las aneuploidías.…”
Section: Resultados Y Discusiónunclassified
“…Muchos estudios han demostrado que la vitrificación produce altas tasas de supervivencia de embriones y ovocitos, así como altas tasas de embarazo (Balaban et al, 2008;Loutradi et al, 2008;Kuwayama y Leibo, 2008;Lane y Gardner, 2001;Smith et al, 2010;Aflatoonian et al, 2010). Existen algunos reportes de re-vitrificación de embriones de ratón (8) y de unos pocos casos clínicos en humanos (Hashimoto et al, 2007;Hiraoka et al, 2006;Hiraoka et al, 2007;Hiraoka et al, 2009;Kumasako et al, 2009;Mauri et al, 2010Mauri et al, , Özmen et al, 2006Son, 2005;Takahashi y Araki, 2004;Yokota et al, 2001). La re-vitrificación de embriones descongelados o entibiados puede ser requerida en algunos casos como: cancelación de la transferencia de embriones por tratamientos médicos imprevistos, motivos personales, presencia de endometrio con líquido o de mala calidad, niveles inmunológicos alterados, o en casos con embriones supernumerarios (Özmen et al, 2006).…”
Section: Introductionunclassified