Motility must be controlled in fresh ejaculate before mixing it with the extender. Once mixture is made, motility checked again before introducing the semen doses in the chamber at 15ºC and once again before making use of the doses to AI. Thanking to these repeated controls, failure ocurrance may be tracked to origin an a a good quality in final doses is assured, just before using them.
Allows us to reject with motility levels under 50% should not be used. Nevertheles, even with motility levels coming over 50% and acceptable ejacutable viabilities, a direct relationship with fertility can not be set, since it has many other influecing factor, as acrosome integrity, plasmatic menbrane status and morpho-abnormalities relative presence.