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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
08/07/2024 |
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Data da última atualização: |
11/07/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
GONÇALVES, J. D.; DIAS, J. H.; MACHADO-NEVES, M.; VERGANI, G. B.; AHMADI, B.; BATISTA, R. I. T. P.; SOUZA-FABJAN, J. M. G.; OLIVEIRA, M. E. F.; BARTLEWSKI, P. M.; FONSECA, J. F. da. |
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Afiliação: |
JOEDSON DANTAS GONÇALVES; JENNIFFER HAUSCHILDT DIAS; MARIANA MACHADO-NEVES; GABRIEL BRUN VERGANI; BAHAREH AHMADI; RIBRIO IVAN TAVARES PEREIRA BATISTA; JOANNA MARIA GONÇALVES SOUZA-FABJAN; MARIA EMILIA FRANCO OLIVEIRA; PAWEL MIECZYSLAW BARTLEWSKI; JEFERSON FERREIRA DA FONSECA, CNPC. |
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Título: |
Transcervical uterine flushing and embryo transfer in sheep: Morphophysiological basis for approaches currently used, major challenges, potential improvements, and new directions (alas, including some old ideas). |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Reproductive Biology, v. 24, n. 3, 100920, Sept. 2024. |
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DOI: |
https://doi.org/10.1016/j.repbio.2024.100920 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: At present, the success of non-surgical embryo recovery (NSER) and transfer (NSET) hinges upon the cervical passage of catheters, but penetration of the uterine cervix in ewes is problematic due to its anatomical structure (i.e., long and narrow cervical lumen with misaligned folds and rings). It is a major obstacle limiting the widespread application of NSER and NSET in sheep. While initial attempts to traverse the uterine cervix focused on adapting or re-designing insemination catheters, more recent studies demonstrated that cervical relaxation protocols were instrumental for transcervical penetration in the ewe. An application of such protocols more than tripled cervical penetration rates (currently at 90-95 %) in sheep of different breeds (e.g., Dorper, Lacaune, Santa Inês, crossbred, and indigenous Brazilian breeds) and ages/parity. There is now sufficient evidence to suggest that even repeatedly performed cervical passages do not adversely affect overall health and reproductive function of ewes. Despite these improvements, appropriate selection of donors and recipients remains one of the most important requirements for maintaining high success rates of NSER and NSET, respectively. Non-surgical ovine embryo recovery has gradually become a commercially viable method as even though the procedure still cannot be performed by untrained individuals, it is inexpensive, yields satisfactory results, and complies with current public expectations of animal welfare standards. This article reviews critical morphophysiological aspects of transcervical embryo flushing and transfer, and the prospect of both techniques to replace surgical methods for multiple ovulation and embryo transfer (MOET) programs in sheep. We have also discussed some potential pharmacological and technical developments in the field of non-invasive embryo recovery and deposition. MenosAbstract: At present, the success of non-surgical embryo recovery (NSER) and transfer (NSET) hinges upon the cervical passage of catheters, but penetration of the uterine cervix in ewes is problematic due to its anatomical structure (i.e., long and narrow cervical lumen with misaligned folds and rings). It is a major obstacle limiting the widespread application of NSER and NSET in sheep. While initial attempts to traverse the uterine cervix focused on adapting or re-designing insemination catheters, more recent studies demonstrated that cervical relaxation protocols were instrumental for transcervical penetration in the ewe. An application of such protocols more than tripled cervical penetration rates (currently at 90-95 %) in sheep of different breeds (e.g., Dorper, Lacaune, Santa Inês, crossbred, and indigenous Brazilian breeds) and ages/parity. There is now sufficient evidence to suggest that even repeatedly performed cervical passages do not adversely affect overall health and reproductive function of ewes. Despite these improvements, appropriate selection of donors and recipients remains one of the most important requirements for maintaining high success rates of NSER and NSET, respectively. Non-surgical ovine embryo recovery has gradually become a commercially viable method as even though the procedure still cannot be performed by untrained individuals, it is inexpensive, yields satisfactory results, and complies with current public expectations of animal welfare stand... Mostrar Tudo |
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Palavras-Chave: |
Biomedical engineering; Cervical dilation; Microrobotics; MOET; Reproduction technologies; Transcervical passage. |
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Thesaurus Nal: |
Assisted reproductive technologies; Biotechnology; Embryo transfer; Ewes; Females; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03151naa a2200385 a 4500
001 2165569
005 2024-07-11
008 2024 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.repbio.2024.100920$2DOI
100 1 $aGONÇALVES, J. D.
245 $aTranscervical uterine flushing and embryo transfer in sheep$bMorphophysiological basis for approaches currently used, major challenges, potential improvements, and new directions (alas, including some old ideas).$h[electronic resource]
260 $c2024
520 $aAbstract: At present, the success of non-surgical embryo recovery (NSER) and transfer (NSET) hinges upon the cervical passage of catheters, but penetration of the uterine cervix in ewes is problematic due to its anatomical structure (i.e., long and narrow cervical lumen with misaligned folds and rings). It is a major obstacle limiting the widespread application of NSER and NSET in sheep. While initial attempts to traverse the uterine cervix focused on adapting or re-designing insemination catheters, more recent studies demonstrated that cervical relaxation protocols were instrumental for transcervical penetration in the ewe. An application of such protocols more than tripled cervical penetration rates (currently at 90-95 %) in sheep of different breeds (e.g., Dorper, Lacaune, Santa Inês, crossbred, and indigenous Brazilian breeds) and ages/parity. There is now sufficient evidence to suggest that even repeatedly performed cervical passages do not adversely affect overall health and reproductive function of ewes. Despite these improvements, appropriate selection of donors and recipients remains one of the most important requirements for maintaining high success rates of NSER and NSET, respectively. Non-surgical ovine embryo recovery has gradually become a commercially viable method as even though the procedure still cannot be performed by untrained individuals, it is inexpensive, yields satisfactory results, and complies with current public expectations of animal welfare standards. This article reviews critical morphophysiological aspects of transcervical embryo flushing and transfer, and the prospect of both techniques to replace surgical methods for multiple ovulation and embryo transfer (MOET) programs in sheep. We have also discussed some potential pharmacological and technical developments in the field of non-invasive embryo recovery and deposition.
650 $aAssisted reproductive technologies
650 $aBiotechnology
650 $aEmbryo transfer
650 $aEwes
650 $aFemales
650 $aSheep
653 $aBiomedical engineering
653 $aCervical dilation
653 $aMicrorobotics
653 $aMOET
653 $aReproduction technologies
653 $aTranscervical passage
700 1 $aDIAS, J. H.
700 1 $aMACHADO-NEVES, M.
700 1 $aVERGANI, G. B.
700 1 $aAHMADI, B.
700 1 $aBATISTA, R. I. T. P.
700 1 $aSOUZA-FABJAN, J. M. G.
700 1 $aOLIVEIRA, M. E. F.
700 1 $aBARTLEWSKI, P. M.
700 1 $aFONSECA, J. F. da
773 $tReproductive Biology$gv. 24, n. 3, 100920, Sept. 2024.
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Embrapa Caprinos e Ovinos (CNPC) |
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| 1. |  | MIANI, M.; LORENSON, M. S.; GUIZZO, J. A.; ESPÍNDOLA, J. P.; RODRÍGUEZ-FERRI, E. F.; GUTIÉRREZ-MARTÍN, C. B.; KREUTZ, L. C.; FRONDOLOSO, R. Antimicrobial susceptibility patterns of Brazilian Haemophilus parasuis field isolates. Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 37, n. 11, p. 1187-1192, novembro. 2017. Título em português: Perfil de susceptibilidade antimicrobiana de isolados clínicos brasileiros de Haemophilus parasuis.| Biblioteca(s): Embrapa Unidades Centrais. |
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