Once a total sperm count is calculated, the number of progressively motile sperm is to be calculated. The total number of sperm multiplied by the progressive motility percentage will yield a number of viable sperm cells. By viable, it is understood to be sperm cells that have the possibility to fertilize an egg and potentially create a pregnancy. Once these basic steps are completed, calculations and preparation for artificial insemination or semen shipments can be made. Even in a live cover situation, it is critical that you have substantial amount of sperm and adequate motility.
Motility has an extremely high correlation to fertility.
If the evaluation is done using semen that has been shipped to a facility for breeding or evaluation, less opportunity is present for a complete evaluation. What can be accomplished, is an evaluation of the quality of the received product. This received product is what you are selling to the mare owner. A cooled or frozen sample is somewhat limited since the person completing the evaluation is unable to gather information from the first three steps listed above and also limited to the actual received product. They are dependent on the data provided to them from the collection site.