Artificial Insemination

We recommend a pre-breeding assessment of the mare - this should be performed when the mare is in season and includes a manual examination of the vagina and cervix, a rectal examination, an ultrasound examination of the reproductive tract and ovaries, the collection and examination of an edometrial smear.

Benefits of AI

The use of artificial insemination reduces the risk of injury to the mare and stallion and reduces the risk of spreading venereal diseases.

The biggest benefit is that the mare owner can choose from the best stallions in the world.


Mares are natural breeders and often start their cycle in April - they can breed until August/September. Mares can be made to start their cycle earlier with the use of hormones or by artifically increasing the length of daylight.

Preparation can be either at stud or home - if facilities are available. A stud is preferable to maximise chances of pregnancy and allow rectal examinations to be performed safely.

If necessary we will stimulate the mare to come into season. We often give an injection of a hormone on Thursday/Friday and the mare will come into season early the following week.

Once in season we will ultrasonically examine her reproductive tract every 24 hours. Once there is a large enough follicle (structure on the ovary that releases the egg), a relaxed cervix and good oedema pattern in the uterus, we administer a drug to induce the follicle to release the egg (ovulation usually occurs 24-48 hours after injection).


Chilled Semen

Semen ordered for the following day and inseminated on arrival, this must be inseminated within 48 hours of collection from stallion.


Frozen Semen

Mare examined as often as every 6 hours to ensure insemination is performed as close to ovulation as possible. This must be inseminated within 12 hours prior to ovulation or 6 hours post ovulation.


The mare is examined the following day to confirm ovulation and assess if the uterus has reacted to the semen. If required, fluid treatments and/or intra uterine antibiotics may be administered.