Mare in heat in December??? - Page 2 - The Horse Forum

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post #11 of 17 Old 12-27-2011, 04:14 PM
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Someone should tell the mares up here that they should be cycling to heat not temperature, a friend is calling the vet to come and lute 4 of her mares having found an escaped stud in with them and all of them have been served

I haven't seen mine cycle, and we do have a stud here, but they are all quite discreet about it unless they are right next to the boy.
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post #12 of 17 Old 12-27-2011, 04:17 PM
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Originally Posted by mls View Post
Mares cycle on light - not temperature.
A little pony im riding and handling came into season a couple of days ago. Nothing drastic though. Could it be due to the winter solstice and the days beggining to get longer? If its to do with light?

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post #13 of 17 Old 12-27-2011, 04:18 PM
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post #14 of 17 Old 12-27-2011, 06:30 PM
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mls,
I would agree that animals and plants are very dependant on the light cycle to determine normal reproduction cycles. I also think many horse owners have observed mares brought into heat with the introduction of a stud in the barn, or other modifiers (not the least of which is temperture in plants). I don't have other horses within a mile of me. No stud at my farm. But the mare came into heat on the shortest day of the year. Mares in heat was a topic of discussion at the hunt barn, the tack store and the feed store. They all had mares that came into heat when the temps got warm.

The article you referenced indicates that a modifier on one hormone can have effects on one of the many hormones that drive the estrus cycle. From another article: "As the mare's brain records the increased amount of light and higher temperatures, the hypothalamus gland located within tissues of the mid-brain is stimulated." , The Horse.com Article # 427.

This isn't an argument, just a thought that I'm not alone in seeing my mare come into heat during a winter warm spell. "Heat Happens."
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post #15 of 17 Old 12-28-2011, 01:55 PM Thread Starter
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Ok, thanks everyone. I'll just keep an eye on her, but otherwise she seems pretty 'normal'.
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post #16 of 17 Old 12-28-2011, 02:01 PM
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Originally Posted by EPMhorse View Post
mls,

This isn't an argument, just a thought that I'm not alone in seeing my mare come into heat during a winter warm spell. "Heat Happens."
Quite, it seems that a few mares haven't read the correct books, they don't know what they should be doing.

It does make you wonder if there will be a fundamental change in triggers if climate change goes on
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post #17 of 17 Old 12-28-2011, 02:03 PM
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Originally Posted by EPMhorse View Post
mls,
I would agree that animals and plants are very dependant on the light cycle to determine normal reproduction cycles.
I supplied the article to answer the question about normal heat cycles.
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