Some breeders start breeding their stallions as early as two years of age. 2010 Sep;185(3):265-71. doi: 10.1016/j.tvjl.2009.07.024. For more information, visit Main Article Photo: Wikimedia Commons - The Canadian-bred Thoroughbred racehorse Northern Dancer is widely considered the most successful sire of the 20th century, having sired some 635 offspring.This article originally appeared in the March 2013 issue of Canadian Horse Journal. A poorly fed stallion is often a poor producer. In 65% of the selected stallions, the correlation coefficients were found to be negative, but without statistical significance. The prerequisite for the analyses of the effect of different stallion age at a constant age of mares was the calculation of the global chi2 used jointly for the evaluation of the variable age of stallions and mares. To determine if his qualities are perpetuated in his offspring when breeding at this age, keep in mind his limitations and manage him accordingly by reducing the number of times he is bred.Despite our attempts to manipulate a stallion’s life and breeding opportunity, ultimately it is up to Mother Nature to prove whether that stallion is able to perpetuate his genetics into his offspring. If stallion B breeds ten mares for one cycle, and gets only four pregnant, then rebreeds the open mares and gets four more in foal, then he has an 80 percent pregnancy rate, but only a 40 percent per cycle pregnancy rate. So it is best to wait a few more years if your stallion is young, and allow your horse to retire from breeding if … This is the only accurate test to determine a stallion’s real fertility. The result are varied and report on the individuality of the effect of stallions, giving no clear basis for generalizing any fertility-decreasing tendency with the higher age of the parents. Research into ways to enhance stallion fertility continues at both Texas A&M and Colorado State. The relationship between stallion fertility and oxidative stress remains poorly understood. The purpose of this study was to identify criteria for thoroughbred fertility assessment by performing a logistical regression analysis using “dismount” sperm parameters as predictors and weekly per-cycle conception rate as the dependent variable. Stud management and the ability to properly prepare and monitor the stallion during the breeding season are key factors in determining success.Let’s start with libido. A higher plane of nutrition needs to be started early in the season so that the proper nutrients are available for the stallion when the demands on him increase. About one in 10 breeding stallions can't perform up to expectations due to subfertility or infertility. Please enable it to take advantage of the complete set of features! Libido can be impacted by poor management, and the stallion’s natural behaviour should always be considered. Breeding stallions are working hard, and should therefore be fed like performance horses in a moderate training program. Is your stud a dud?
For example, if stallion A breeds ten mares for one cycle and gets eight pregnant, he has an 80 percent per cycle pregnancy rate. The study was based on the documentation of the Napajedla Stud Farm of the English Thoroughbred horse for 1888-1972. Libido is the top-limiting factor for breeding operations.
The problem is analyzed from the physiological viewpoint. Clipboard, Search History, and several other advanced features are temporarily unavailable. Libido can be increased behaviourally or through the use of hormones; however, the latter is not recommended, as by disrupting the normal hormonal balance of the stallion you could ultimately create a larger problem with lowered sperm production.On the other hand, although he may have the libido to perform, a stallion may not have the sperm package to deliver. The average age of a young woman's first period is 12 to 13 (12.5 years in the United States, 12.72 in Canada, 12.9 in the UK) but, in postmenarchal girls, about 80% of the cycles are anovulatory in the first year after menarche, 50% in the third and 10% in the sixth year.A woman's fertility peaks in her early and mid-20s after which it starts to decline.
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