Use of a computerized system for evaluation of equine spermatozoal motility.

The research focuses on the evaluation of a computerized system (Hamilton-Thorn motility analyzer or HTMA) for measuring sperm motility in horses. It compares this system to traditional video microscopy and considers potential influences of sperm count per microscopic field.

Details of the Study

• Three ejaculates from each of 3 stallions were used for the study and processed through a computerized system called Hamilton-Thorn motility analyzer (HTMA) for measuring sperm motility
• Each stallion’s ejaculates were diluted to a sperm count of 25 x 10(6) spermatozoa/ml with a skim milk-glucose seminal extender in order to provide a level playing ground for the study.
• Evaluation of variance components: Various factors in the process were evaluated for potential variance such as the ejaculate within stallion, the chamber within the ejaculate, and microscopic field within chamber.

Comparison with Videomicrography

• A comparison was made between the HTMA method and a traditional, frame-by-frame playback videomicrography, for measuring motility and quantity of spermatozoa, as well as evaluating individual spermatozoa pathways.
• The study found that HTMA was highly correlated in its results with traditional methods, suggesting it may be an effective, modern replacement.
• Despite this correlation, the paper reports that HTMA consistently gave higher sperm counts per microscopic field and higher motility rates than the traditional videomicrography.

Effect of Sperm Count

• The research also looked at the effect of sperm count per microscopic field on intersecting spermatozoa and the outcome of such intersections.
• It found that there was significant variability in motility measures due to the factor of microscopic field within the chamber.
• However, the exact outcomes of high sperm counts and intersecting spermatozoa are not elaborated upon in this abstract.

Conclusions

• The study concluded that there is a high correlation between HTMA and traditional videomicrography in measuring sperm counts and motility.
• However, HTMA yields higher results for counts and motility, making it potentially more favorable for use in breeding or fertility testing.
• The HTMA also proved less variable in its measurements than traditional methods for three out of five track types, once again suggesting its potential effectiveness as a modern replacement.