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Mares going north and shutting down

Equine-Reproduction.com Bulletin Board » Breeding Problem Mares - Volume 1 » Mares going north and shutting down « Previous Next »


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Kaye Truly
Posted on Friday, March 30, 2001 - 09:45 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Has there been any research done on the affects of mares from the southern states who are hauled to northern states shutting done their cycles? I have seen that this year especially, my mares that have gone north are shutting down. The mares I am doing shipped semen on down here are all having good strong cycles and are being bred. I am 40 miles north of Houston, Tx and sent mares to Illinois, Okla, and even north Tx and they have shut down. I realize that light is what affects the cycle and I start putting the mares under lights Dec 1 each year, but it seems going north affects them. If this is the case I would have better and cheaper results keeping them home and doing shipped semen. Any ideas??
 

Jos
Posted on Friday, March 30, 2001 - 10:47 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Although I am not aware of any research in this topic, I am familiar with the scenario.

It is important to maintain mares that have been "under lights" under lights. In other words, once phototropic stimulation has been started it is essential that it is maintained until about 40 days after the mare ovulates and is checked in foal (ceasing it sooner may result in problems with the mare re-entering estrus in the event she does not become pregnant). I suspect if this is done, that you will have a better success rate, as it is, as you say, the light that is the stimulating factor rather than the location!

Good luck!



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