Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/48573
Title: In vivo embryo production and recovery in lacaune ewes after imposing a superovulation treatment regimen is related to pFSH dose
Keywords: Dairy sheep
Gonadotropins
Multiple ovulation and embryo transfer (MOET)
Transcervical
Uterine flushing
Ovino leiteiro
Gonadotrofinas
Múltipla Ovulação e Transferência de Embriões
Issue Date: Dec-2020
Publisher: Elsevier
Citation: FIGUEIRA, L. M. et al. In vivo embryo production and recovery in lacaune ewes after imposing a superovulation treatment regimen is related to pFSH dose. Animal Reproduction Science, [S. I.], v. 223, Dec. 2020. DOI: https://doi.org/10.1016/j.anireprosci.2020.106625.
Abstract: This study was conducted to assess effects of different doses of pFSH on follicular recruitment, superovulatory response, ova/embryo recovery, and embryo yield in lactating ewes. Ewes (n = 24) had a superovulation treatment regimen imposed. All ewes were implanted with a progesterone intravaginal device for 9 d, and administered either 100 (G-100) or 200 (G-200) mg pFSH, proportioned into six doses administered at 12-h intervals, starting 60 h before device removal. At 7 days subsequent to progesterone device removal, there were non-surgical embryo recoveries (NSER) from ewes having three or more corpora lutea. At the time of the first pFSH injection, number of antral follicles were similar (P < 0.05) between ewes in the G-100 and G-200 group, however, there were more 3.1–4.0 mm follicles in ewes of the G-200 than G-100 group at the time of the second pFSH administration. Estrous response and CL number were less (P < 0.05) in ewes of the G-100 (66.7 % and 2.6 ± 0.7) than G-200 (91.7 % and 11.6 ± 1.2) group. There were embryo collections from 100 % and 90.9 % of ewes in the G-100 and G-200 groups, respectively (P > 0.05). Viable embryo numbers and ova/embryo recovery rate were greater (P < 0.05) in ewes of the G-200 (6.9 ± 1.1 and 67.8 %) than G-100 (1.0 ± 0.5 and 27.6 %) group. A dose of 200 mg pFSH was more effective in inducing a superovulatory response and embryo yield after NSER in ewes, however, the 100 mg dose was insufficient for these purposes.
URI: https://doi.org/10.1016/j.anireprosci.2020.106625
http://repositorio.ufla.br/jspui/handle/1/48573
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DZO - Artigos publicados em periódicos

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