Artificial Insemination

• The mare and stallion do not come into contact thereby reducing the risk of  breeding accidents.
• Reduces the risk of sexually transmitted disease.
• Limitless genetic scope with the use of frozen semen from high profile national or international stallions.
• Allows mares to be bred without the risk of travel - especially aged or injured mares.
• Semen evaluation at the time of insemination
• Prevents stallion over use.
• Facilitates breeding of mares with reproductive problems.
• Enables breeding of ‘shy’ mares who may not show to a stallion or who become overly protective of a foal.
• Allows mares to be bred at the optimal time for conception.
• Using frozen semen allows genetic use of a stallion long after his death.

Stallions are collected at the breeding centre for insemination into a mare at the optimal stage of her cycle. Stallions standing at the breeding centre may be used or outside stallions can be brought in for collection. At Equivet Breeding Centre, a phantom or an ovariectomised mare is used to collect the stallion. 

CHILLED SEMEN

Although chilled semen can be stored during transport for up to 48 hours (or even longer with some semen extender), ideally it should be used as soon as possible after collection. Once the breeding cycle of your mare is established she will be monitored closely and our veterinarians will order chilled semen directly from the stallion owner or agent. The process will ensure that semen is shipped to our breeding centre for insemination of your mare at the optimum time for a possible conception.

The semen is evaluated in the laboratory and a semen extender is added to assist in prolonging the life of the semen.  Depending on the facility where the stallion is collected, other treatments may also be applied to the semen to improve its longevity in order to survive the trip to the receiving mare.   The extended semen is then transported in an Equi-tainer (similar to a vacuum flask) or Salter box (Styrofoam) which will gradually reduce the semen temperature to 4 - 5°C during the trip.  The receiving mare should be inseminated as soon as possible after the arrival of the chilled semen.

Once the breeding cycle of your mare is established she will be monitored closely and our veterinarians will order chilled semen directly from the stallion owner or agent. The semen will be shipped to us for insemination into your mare at the optimum time for a possible conception.

“Frosty” – the first frozen embryo foal in Australia transferred & born at the Equine Breeding Centre

Much, but not all frozen semen can be stored indefinitely in nitrogen tanks and at the Equine Breeding Centre we have used semen frozen over 20 years ago with excellent results.  Unfortunately it is impossible to predict how well a stallion’s semen freezes until a sample has been collected, frozen and evaluated. However, inseminating a mare and achieving a pregnancy is the best test. It is also impossible to predict how many straws can be frozen per ejaculate, until after the stallion’s semen is evaluated.  A compilation of results of the two evaluations (frozen and fresh) will determine how many straws will be required per mare per insemination.

The success or failure of the procedure again relies upon on the skills of the veterinarian attending the receiving mare, as it is essential that the mare be inseminated as close to ovulation as possible.  While fresh semen may remain viable in the uterus for 3 to 5 days, frozen semen may remain viable for less than six hours, so the timing of insemination is critical.  Once the mare is in oestrus and to ensure that the mare is inseminated at the optimal time, she must be examined at least every six hours.  If everything goes well and semen quality is good, a conception rate of approximately 60% per cycle can be expected. Although the internationally accepted conception rate with frozen semen is 30% - Equivet Australia consistently achieves conception rates greater than 75%, with good semen.

Please ensure that arrangements for semen are made with the stallion / semen owner prior to the arrival of your mare at Equivet Australia. Timing of the insemination is critical for fresh, chilled and frozen semen and delays can be very costly if semen is not available and a cycle is missed.