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- W2893803558 abstract "Contents This study investigated correlations among ram semen quality parameters, testicular vascularity and echotexture. Measurements were performed biweekly for a year, before ( BE ) and after ejaculation ( AE ), on seven Chios breed rams [three rams (group A) and four rams (group B) of 2–6 and 9–13 years old, respectively], considering breeding (1) and non‐breeding period (2). Hemodynamics [Pulsatility Index ( PI ), Resistive Index ( RI )] were evaluated in each testis. Images of testicular parenchyma were analysed to evaluate echogenicity [Mean Value ( MV ), Contrast (Con), Gray Value Distribution ( GVD ), Run Length Distribution (RunLD), Long Run Emphasis (LRunEm)]. Semen volume (V), concentration (C), kinetics ( CASA ), morphology (Sperm Blue), viability (Eosin‐Nigrosin) and DNA fragmentation (Acridine Orange) were assessed. In group A/2, semen V was correlated to left testis PI and right testis RI , BE ( r = 0.4, p = 0.013/ r = 0.6, p < 0.001, respectively), and to right testis PI and RI , AE ( r = 0.5, p < 0.001). In A/1/AE, semen C was correlated to left testis PI ( r = −0.5, p = 0.003). In group A/1/BE, RI of both testes was correlated to total and tail abnormalities (left: r = −0.5, p = 0.008/ p = 0.004, respectively – right: r = −0.4/ r = −0.5, p = 0.01/ p = 0.008, respectively). In group B/1/BE, sperm tail and total abnormalities were correlated to left testis Con ( r = 0.5, p = 0.02/ p < 0.001, respectively), whereas in A/2/BE, they were correlated to left testis LRunEm ( r = −0.8/ r = −0.7, p < 0.001, respectively). In group A/1/BE, DNA damage was correlated to right testis LRunEm ( r = −0.6, p < 0.001) and tail abnormalities to left testis PI ( r = −0.5, p = 0.03). In group B/1/AE, right testis LRunEm, GVD , RunLD, were correlated to sperm DNA integrity ( r = −0.9, p < 0.001). Immotile spermatozoa and viability were correlated to left testis Con in group B/2/AE ( r = −0.6/ r = 0.6, p < 0.001) and to right testis MV in group A/1/AE ( r = −0.6/ r = 0.6, p < 0.001). In conclusion, alterations in both ram testes blood flow and echotexture seem to be moderately correlated with sperm assessed parameters, depending on season and ram age." @default.
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- W2893803558 date "2018-09-01" @default.
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- W2893803558 title "Effects of testicular hemodynamic and echogenicity changes on ram semen characteristics" @default.
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- W2893803558 doi "https://doi.org/10.1111/rda.13279" @default.
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