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| BEVILAQUA, J. R.; RODRIGUEZ, M. K.; MACIEL, G. S.; VERGANI, G. B.; FONSECA, J. F. da; OLIVEIRA, M. E. F.. |
| In vivo embryo production performs an important role in small ruminants, however the efficiency of this biotechnology has high variability. In this context, the occurrence of luteal dysfunction is exacerbated in superovulated females (Rodriguez et al., 2015) and it is an unwanted response wich may be related to low embryo production. Thus, it is possible to highlight the need to expand knowledge related to the corpora lutea functionality, as well as determinative tools for ultrasound diagnosis. The aim of this study was to test correlations between biometric variables, luteal vascularization and serum progesterone concentrations. In conclusion, luteal vascularization is an indicative of corpus luteum functionality in superovulated ewes. |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Folliculogenesis; Sheep; Ewes; Animal reproduction; Superovulation; Corpus luteum; Oogenesis. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1132659 |
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| VERGANI, G. B.; ARRAIS, A. M.; MELLO, M. R. B. de; DIAS, J. H.; SOUSA, M. A. P. de; MORAIS, M. C. da C.; FERREIRA, H. C.; BEVILAQUA, J. R.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da. |
| Abstract: The variability of superovulatory responses is still a limiting factor for the consolidation of commercial embryo transfer programs in small ruminants (Bartlewski et al. 2016. Theriogenology, 86: 130-143). Superovulation protocols are traditionally performed with prior use of progesterone devices for short- or long-term duration (Oliveira et al. 2014. Anim Reprod Sci, 144: 30-37) associated exogenous FSH administration. The presence of dominant follicles in the ovary at the beginning of FSH treatment is detrimental to the growth of the other follicles, in addition, a greater number of antral follicles is required to have a bigger superovulatory response (Fonseca et al., 2010 Acta Sci Vet, 38: 337-369). In this context, the objective of this study... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Ovarian population; População ovariana; Ovino; Ovelha; Progesterona; Superovulação; Reprodução Animal; Transferência de Embrião; Sheep; Animal reproduction; Progesterone; Superovulation; Embryo transfer. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112224 |
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| BEVILAQUA, J. R.; FERREIRA, H. C.; VERGANI, G. B.; RODRIGUES, M. A. F.; MACIEL, G. S.; RODRIGUEZ, M. G. K.; RODRIGUES, N. N.; FONSECA, J. F. da; OLIVEIRA, M. E. F. de. |
| Abstract: The in vivo production of embryos is used to accelerate the multiplication of the herds, but the efficiency of this biotechnology is widely variable in small ruminants. The variability of the superovulatory responses and the production of viable embryos has been related to several factors, including the dose of gonadotrophin used in the hormonal treatment of superovulation, and the occurrence of prematurely regressing corpora lutea. In this context, the present study was performed to evaluate the effect of different doses of pFSH on the superovulatory response and vascularization percentage of the corpora lutea (CLs) formed. In conclusion, the vascularization percentage of the corpora lutea during the initial luteal phase is affected by the dose... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Corpora lutea; Ultrasound; Vascularization; Vascularização; Ovino; Ovelha; Reprodução Animal; Superovulação; Corpo Lúteo; Ultrassom; Ewes; Superovulation. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112211 |
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