Assessing Sperm Morphology in Stallions Table Topic (AAEP 2010)

A Table Topic on stallion sperm morphology at the 2010 American Association of Equine Practitioners Annual Meeting, held Dec. 4-8 in Baltimore, Md., revolved around the analysis of different sperm defects on the stallion and what their effects were on the fertility of individual stallions.

The conclusions of the discussion were:

  • To accurately assess sperm morphology it's important to have a good-quality microscope with a 100 x objective;
  • Proper handling of the sample is also important as well as identification of the frequency of defects in cells; and
  • Identification of the number of sperm with multiple defects is probably more indicative of potential fertility problems than a high percentage of cells with a single type of defect.

This session was moderated by Dickson Varner, DVM, MS, Dipl. ACT, professor in the Department of Large Animal Medicine and Surgery at Texas A&M University, and Juan Samper, DVM, PhD, Dipl. ACT, of JCS Veterinary Reproductive Services near Vancouver, British Columbia.

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