Allows an owner to use sperm from stallions that are too far to travel, in another country, still competing, or in some cases, dead.

It involves the placement of fresh, cooled or frozen semen in the reproductive tract of the mare at the time of ovulation, which is done through a catheter placed in the mare’s cervix by a veterinarian.

Fresh semen is used almost immediately after collection and is used in A.I to increase the efficiency and reduce the workload of the stallion.

In order to extend the viability of the semen, it can be cooled. This means that it is collected, then diluted with a semen extender and then it can be transported to the mare. Generally the semen can be viable for up to 36-48 hours, however the longer from the time of collection, the less motile the spermatozoids.

Frozen semen is collected and extended in much the same way as cooled semen, and then it is stored in straws with liquid nitrogen. It allows access to semen from horses that are overseas, currently competing and in some cases, dead. The spermatozoids are generally less motile once they have been frozen than if they were fresh, so in order to increase the chance of impregnation, the mare will need to be closely monitored in order to insert the semen as close to ovulation as possible.

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