Semen collection with an artificial vagina while the stallion mounts a phantom rather than a live “jump mare” is practiced by most professional collection facilities and is a way to increase safety for both the stallion and the handlers, as well as improve the hygiene of the collection process. Training a stallion to mount a phantom can be accomplished with nearly all stallions, including novice stallions that have no breeding experience.

There are a variety of reasons that stallion owners want to have semen collected from their young stallions:

  • evaluation of sperm production and quality to assess suitability as a breeding stallion;
  • training to collect on a phantom with an artificial vagina in preparation for a breeding career;
  • to collect and preserve semen from a young stallion prior to castration or starting a performance career.

When to Start?

We advise clients to wait until early spring of the stallion’s three-year-old year before training to collect semen. Some owners request collecting semen from two-year-old stallions and we have done this successfully; however, for many stallions there are a number of reasons why we advise waiting until they are three. Stallions reach puberty (defined as the age when they can produce 50 million sperm with >10% motility) generally between one-and-a-half and two years of age. Testosterone increases after about 20 months of age and spermatogenesis develops to where there is a complete compliment of germ cell types in the testicle at 24-36 months. Sexual maturity however, is not reached until 4-5 years of age. Daily sperm production (DSP) is directly related to testicular size and the stallion’s testicles will continue to grow until sexual maturity.

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