Older Mare- No Longer Comes into Heat, but Not Pregnant? - The Horse Forum
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post #1 of 6 Old 07-29-2013, 12:07 PM Thread Starter
Green Broke
 
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Older Mare- No Longer Comes into Heat, but Not Pregnant?

My BO has a 21 year old thoroughbred mare that she competed on for years in endurance, and now she has a foal out of her every few years. She has been checked by a vet and she is reproductively, and in all other ways, sound. She holds her weight well, carries a foal and foals without complication. she is easy to breed, shows heat obviously. the only quirk is that she typically shows heat and allows breeding three weeks after she was bred successfully. she is like that with every pregnancy.

My BO acquired a stallion last year that complements the mare nicely, so she wanted to have one last foal out of her. she consulted the vet(an equine reproductive specialist) and was given the green light to go ahead.
her and a couple other mares were bred in late april, early may(early foals are desirable in thoroughbreds), and were ultra sounded open(at 18 days). they were all rebred in late may, the other mares were in foal, but the older mare was again ultra sounded open at 20 days. The barn owner thought she would give it one more chance, so teased her regularly from the middle of June till now. she will start 'flirting' with the stallion, then squeal and lash out violently with a hoof, which is extremely uncharacteristic. there have been no signs of discharge or a foal being aborted at any point, and she is examined every day by the Bo. She has not been in heat at any point.

what is going on with this mare?
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post #2 of 6 Old 07-29-2013, 12:16 PM
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Like women, the child bearing years end sooner for some.
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post #3 of 6 Old 07-29-2013, 12:42 PM Thread Starter
Green Broke
 
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I would normally agree 100%, but why would she come into heat normally in April and may, then stop in the height of summer, when most mares are most fertile?

Has anyone heard of a very experienced vet missing a fetus?
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post #4 of 6 Old 07-29-2013, 04:21 PM
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I've heard of LOTS of vets missing a pregnancy. But I've seen older mares cycle one month and be done the next.
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post #5 of 6 Old 07-29-2013, 10:54 PM
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When was the last time this mare had a foal? Was she checked by a vet to make sure she was clean and clear of any germs from the last time she was bred?
IMO it is easier to breed an older mare if she has had a foal in the last year or so.
There is no reason she cannot conceive and produce a foal unless she no longer cycles. Next year try the fertility shots early in the year. Shalom
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post #6 of 6 Old 07-30-2013, 12:28 AM Thread Starter
Green Broke
 
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She was fully examined by the vet and deemed reproductively clean and ready to breed. Her last foal was 2 years ago. She caught on the first breeding with the last one, carried to term and foaled a large, healthy colt with no complications. Looking at this mare you might guess she was 15, and riding her you would guess 5 lol.
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