The efficient use of equine cryopreserved semen.
In order to optimize the efficient use of cryopreserved stallion semen, recent research has focused on the minimum insemination dose of frozen-thawed spermatozoa required for maximum fertility rate. The results appear to be highly stallion-dependent. Factors such as the timing of AI with respect to ovulation, as well as the site of insemination within the mare's reproductive tract, also affect success in breeding with frozen-thawed semen. Since acceptable pregnancy rates can be achieved from insemination of mares with very low numbers of spermatozoa, increasing the number of insemination doses processed from a single ejaculate may prove more cost-effective to stallion owners.
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Honahlee PC, Sherwood, OR, USA. honahlee@imagina.com
D000818:Animals; D001947:Breeding; D015925:Cryopreservation; D005260:Female; D006736:Horses / Q000502:physiology*; D007315:Insemination, Artificial / Q000379:methods; D008297:Male; D011247:Pregnancy; D018873:Pregnancy Rate; D012661:Semen / Q000502:physiology*; D012662:Semen Preservation; D013997:Time Factors