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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
11/09/2024 |
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Data da última atualização: |
13/12/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VIANA, J. H. M.; SILVA, B. D. M.; MOURA, R. M. de; FÉRES, L. F. R.; FIGUEIREDO, R. A. |
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Afiliação: |
JOAO HENRIQUE MOREIRA VIANA, CENARGEN; BIANCA DAMIANI MARQUES SILVA, CENARGEN; RODRIGO MARTINS DE MOURA, UNIVERSIDADE DE BRASÍLIA; LUIZ FERNANDO RODRIGUES FÉRES, UNIVERSIDADE EDSON ANTÔNIO VELANO; RICARDO ALAMINO FIGUEIREDO, CENARGEN. |
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Título: |
Oocyte developmental potential and embryo production before puberty in cattle. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Animal Reproduction, v. 21, n. 3, e20240069, 2024. |
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DOI: |
http://dx.doi.org/10.1590/1984-3143-AR2024-0069 |
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Idioma: |
Inglês |
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Conteúdo: |
With the development of in vitro technologies, embryos can be produced using oocytes retrieved directly from the ovaries, i.e., regardless of ovulation. This has allowed the use of different animal categories as oocyte donors, including prepubertal cattle. The advantages of using this strategy to shorten the generation interval and accelerate genetic gain over time were soon recognized, and the first offspring generated using oocytes collected from calves were born in the early 1990s. Nevertheless, embryo production from calves and prepubertal heifers remains a challenge. The oocytes collected before puberty present low in vitro developmental potential, and the subsequent blastocyst rates are consistently lower than those from pubertal females. The acquisition of developmental competence by the oocytes occurs progressively throughout the prepubertal period, which can be subdivided into an early, intermediate, and late prepubertal (or peripubertal) phases, each characterized by different physiological and endocrine features. Therefore, embryo yield increases with age but will only achieve its maximum after puberty. The most common strategy to improve oocyte developmental potential before puberty is the use of gonadotrophic stimulation prior to oocyte retrieval. The results with superstimulation, however, vary among studies, depending on the source, dose, and length of FSH treatment, as well as the age and breed of the donors. The use of calves and prepubertal heifers as oocyte donors should also consider the possible impacts of the oocyte retrieval technique (LOPU or OPU) and the use of exogenous hormones on their subsequent fertility and productive life. MenosWith the development of in vitro technologies, embryos can be produced using oocytes retrieved directly from the ovaries, i.e., regardless of ovulation. This has allowed the use of different animal categories as oocyte donors, including prepubertal cattle. The advantages of using this strategy to shorten the generation interval and accelerate genetic gain over time were soon recognized, and the first offspring generated using oocytes collected from calves were born in the early 1990s. Nevertheless, embryo production from calves and prepubertal heifers remains a challenge. The oocytes collected before puberty present low in vitro developmental potential, and the subsequent blastocyst rates are consistently lower than those from pubertal females. The acquisition of developmental competence by the oocytes occurs progressively throughout the prepubertal period, which can be subdivided into an early, intermediate, and late prepubertal (or peripubertal) phases, each characterized by different physiological and endocrine features. Therefore, embryo yield increases with age but will only achieve its maximum after puberty. The most common strategy to improve oocyte developmental potential before puberty is the use of gonadotrophic stimulation prior to oocyte retrieval. The results with superstimulation, however, vary among studies, depending on the source, dose, and length of FSH treatment, as well as the age and breed of the donors. The use of calves and prepubertal heifers as oocyt... Mostrar Tudo |
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Palavras-Chave: |
In vitro embryo production. |
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Thesaurus Nal: |
Cattle; Sexual maturity. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02357naa a2200217 a 4500
001 2167310
005 2024-12-13
008 2024 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/1984-3143-AR2024-0069$2DOI
100 1 $aVIANA, J. H. M.
245 $aOocyte developmental potential and embryo production before puberty in cattle.$h[electronic resource]
260 $c2024
520 $aWith the development of in vitro technologies, embryos can be produced using oocytes retrieved directly from the ovaries, i.e., regardless of ovulation. This has allowed the use of different animal categories as oocyte donors, including prepubertal cattle. The advantages of using this strategy to shorten the generation interval and accelerate genetic gain over time were soon recognized, and the first offspring generated using oocytes collected from calves were born in the early 1990s. Nevertheless, embryo production from calves and prepubertal heifers remains a challenge. The oocytes collected before puberty present low in vitro developmental potential, and the subsequent blastocyst rates are consistently lower than those from pubertal females. The acquisition of developmental competence by the oocytes occurs progressively throughout the prepubertal period, which can be subdivided into an early, intermediate, and late prepubertal (or peripubertal) phases, each characterized by different physiological and endocrine features. Therefore, embryo yield increases with age but will only achieve its maximum after puberty. The most common strategy to improve oocyte developmental potential before puberty is the use of gonadotrophic stimulation prior to oocyte retrieval. The results with superstimulation, however, vary among studies, depending on the source, dose, and length of FSH treatment, as well as the age and breed of the donors. The use of calves and prepubertal heifers as oocyte donors should also consider the possible impacts of the oocyte retrieval technique (LOPU or OPU) and the use of exogenous hormones on their subsequent fertility and productive life.
650 $aCattle
650 $aSexual maturity
653 $aIn vitro embryo production
700 1 $aSILVA, B. D. M.
700 1 $aMOURA, R. M. de
700 1 $aFÉRES, L. F. R.
700 1 $aFIGUEIREDO, R. A.
773 $tAnimal Reproduction$gv. 21, n. 3, e20240069, 2024.
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