Correlations between testicular hemodynamic and sperm characteristics in rams

  • Leonardo Batissaco Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Eneiva Carla Carvalho Celeghini Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Fábio Luis Valério Pinaffi Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Bruna Marcele Martins de Oliveira Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • André Furugen Cesar de Andrade Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Elena Carolina Serrano Recalde Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • Claudia Barbosa Fernandes Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
Keywords: Ovine, Spermatozoa, Blood flow, Doppler, Testicle

Abstract

The testicular artery is responsible for the blood supply that reaches the testis and has great importance in heat radiation. Vascular changes in the testis may lead to damage in sperm production, reflected in sperm motility and morphology. The aim of the present study was to evaluate correlations between testicular vascularity and sperm characteristic. Eight adult Santa Ines rams showing different reproductive status were used. The testicular vascularity and sperm characteristics were evaluated fortnightly during 90 days. Color Doppler ultrasonography was used to evaluate the testicular hemodynamic. Resistance index (RI) and pulsatility index (PI) of the testicular artery were evaluated by spectral-Doppler mode. The color-Doppler mode was used to evaluate the blood flow of the pampiniform plexus and testicular parenchyma. The semen analyses assessed were volume, concentration, motility, and morphology. The data were submitted to Pearson´s linear correlations test (p < 0.05 was considered significant). No correlations were found between motility and testicular hemodynamic. The percentage of total sperm defects was positively correlated to left and right parenchymal score and to left RI and PI. On the other hand, the pampiniform plexus score was positively correlated to the number of colored pixels and negatively correlated to the RI and PI, for both sides. This study showed that the increase of sperm defect can be related to increase of testicular blood flow; however, more studies are need.

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Published
2013-10-29
How to Cite
Batissaco, L., Celeghini, E. C., Pinaffi, F. L., Oliveira, B. M., Andrade, A., Recalde, E. C., & Fernandes, C. (2013). Correlations between testicular hemodynamic and sperm characteristics in rams. Brazilian Journal of Veterinary Research and Animal Science, 50(5), 384-395. https://doi.org/10.11606/issn.2318-3659.v50i5p384-395
Section
ARTICLES