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• W2039446893 abstract "O rastreamento genético pré-implantacional parece melhorar as taxas de gravidez em certos grupos de pacientes com mau prognóstico nos tratamentos de fertilização in vitro. Mais recentemente tem-se sugerido seu uso para a seleção visando à transferência de um embrião único. O presente artigo tem como objetivo discorrer sobre a técnica de hibridização genômica comparativa, a biópsia do embrião na fase de blastocisto e as perspectivas de uso desses como rastreamento genético pré-implantacional. Foi feita revisão bibliográfica em artigos científicos, livros e periódicos. O método de hibridização genômica comparativa é capaz de analisar todos os pares cromossômicos e mostra-se promissor na identificação das aneuploidias. A biópsia do embrião na fase de blastocisto parece ser menos agressiva e fornece mais material genético do que aquela feita na fase de clivagem. A transferência de um embrião geneticamente normal aumenta as chances de gravidez nos procedimentos de fertilização in vitro. Entretanto, ainda não temos estudos randomizados controlados suficientes para assegurar que a hibridização genômica comparativa em blastocisto tenha impacto prático suficiente para aumentar as chances de gravidez. Pre-implantation genetic screening could improve pregnancy rates in certain groups of patients with poor prognosis undergoing in vitro fertilization procedures. Recently its use as screening has been suggested aiming single embryo transfers. This paper evaluates comparative genomic hybridization technique, blastocyst stage embryo biopsy and analyzes the prospects of using both as pre-implantation genetic screening. A bibliographical review in scientific articles, books, journals and websites was done. Comparative genomic hybridization is able to analyze all chromosomes being promising as pre-implantation genetic screening. Blastocyst biopsy seems to be less aggressive to the embryo and provides additional genetic material compared to cleavage stage biopsies. The transfer of a genetically normal embryo increases pregnancy rates in in vitro fertilization procedures. However there are insufficient randomized controlled trials to ensure that comparative genomic hybridization in blastocysts cells has a practical impact in pregnancy rates." @default.
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• W2039446893 date "2013-05-01" @default.
• W2039446893 modified "2023-09-26" @default.
• W2039446893 title "Perspectivas de uso da hibridização genômica comparativa como rastreamento pré-implantacional em biópsias de embrião humano no estágio de blastocisto" @default.
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• W2039446893 doi "https://doi.org/10.1016/j.recli.2013.05.005" @default.
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