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https://locus.ufv.br//handle/123456789/31293
Tipo: | Artigo |
Título: | Relationships between follicle and corpus luteum size and vascularization with ovulation, progesterone production, and pregnancy in Nellore beef cattle |
Autor(es): | Couto, Samuel Rodrigues Bonamichi do Guerson, Yuri Barbosa Morais, Rita de Cássia Lima Grillo, Gustavo Fernandes Andrade, João Paulo Nascimento Jacob, Julio Cesar Ferraz Barbero, Rondineli Pavezzi Mello, Marco Roberto Bourg de |
Abstract: | The objective of this study was to evaluate the relationships between preovulatory follicle (POF) and corpus luteum (CL) diameters, and POF and CL vascular perfusion with progesterone production, ovulation, and pregnancy in Nellore cows subjected to timed artificial insemination (TAI). Nellore cows (n = 201) were subjected to ovulation synchronization and later to ultrasound evaluation of POF and CL at the time of insemination (D0) and seven days later (D7), respectively. Females were divided into three categories according to the POF diameter assessed at the time of insemination: small (SF), medium (MF), and large (LF) follicles. The LF group had a greater number and intensity of pixels in the POF ultrasound exam compared with the SF group. The CL flow intensity and progesterone concentration were also higher in the LF group. The SF group showed lower flow intensity and lower ovulation rate compared with the others. When non-pregnant females were compared to pregnant ones, no difference was observed in any of the analyzed variables. The results show for the first time in Nellore cattle the relationship between the size of ovarian structures and blood flow (quantity and intensity) as well as the ability of the CL to produce progesterone. The intensity of the POF pixels proved to be relevant, demonstrating correlations with the size and flow of the CL, which were not found when evaluating only the number of pixels, thus revealing the importance of evaluating complementary characteristics of the flow |
Palavras-chave: | cattle color Doppler ovary preovulatory follicle vascular perfusion |
Editor: | Brazilian Journal of Animal Science |
Citação: | Couto, S. R. B.; Guerson, Y. B.; Morais, R. C. L.; Grillo, G. F.; Andrade, J. P. N.; Jacob, J. C. F.; Barbero, R. P. and Mello, M. R. B. 2023. Relationships between follicle and corpus luteum size and vascularization with ovulation, progesterone production, and pregnancy in Nellore beef cattle. Revista Brasileira de Zootecnia 52:e20220148 |
Tipo de Acesso: | Creative Commons Attribution License |
Identificador DOI: | https://doi.org/10.37496/rbz5220220148 |
URI: | https://locus.ufv.br//handle/123456789/31293 |
Data do documento: | 4-Ago-2023 |
Aparece nas coleções: | Artigos |
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1806-9290-rbz-52-e20220148.pdf | artigo | 470,56 kB | Adobe PDF | Visualizar/Abrir |
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