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Studies performed on ejaculates from several species have identified discrete subpopulations of motile sperm. In dogs, motile sperm subpopulations have also been described in fresh and frozen‐thawed semen. The subpopulation of the most rapid and progressively motile sperm has been suggested to be the most likely source of fertilizing spermatozoa. However, the significance of subpopulation differences...
The aims of the present study were to compare the effects of two commercial preparations (Equex STM Paste or Equex Pasta), whose active ingredient is sodium dodecyl sulphate (SDS), added to a Tris–egg yolk-based extender, on post-thaw sperm survival and longevity, as well as on the intracellular Ca 2+ concentration of dog spermatozoa during incubation at 38°C. One ejaculate was collected from...
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