I have recently aquired a mare that has successfully had 4 healthy foals. After her last foal (sired by Zorn, who's EVA status is apparently unknown), she was bred again, and concieved successfully. Her blood test showed hormone levels that were not consistant with a pregnancy of 90 days (when she had the blood test done). She aborted a filly at 150 days. There was said to be a 75% chance of this mare getting in foal again. She was bred the next year and did not catch, I am not sure the details of the breeding that year, as I had left the barn where she was, but I know it was frozen semen. She was in a very stressful enviornment at her previous barn, she is much calmer and happier where I have her now. The problem is that she is older (18 this year). I am going to try and breed her in March.
But my question is; do you know what could have caused the abortion? As far as I know, she was an otherwise healthy mare. Any ideas? I am willing to go to great lengths to get this lovely mare in foal :]
Without performing a necropsy, one could not even possibly conjecture on what caused the abortion. There are too many possibilities.
One that you almost certainly can rule out though would be EVA from the stallion that you mention, as mares bred to EVA "shedding" stallions will not abort, although they themselves may be infectious for the 21-28 days after breeding and may cause other mares to abort. The only way that this mare cold have aborted due to EVA would be if she came into contact with an infectious animal within the preceding 30 days prior to the abortion, and even then only if she herself did not have elevated EAV antibody titres (note that EAV refers to the virus, while EVA refers to the disease).
A good starting point to go to with this mare prior to rebreeding would be a thorough breeding soundness evaluation, with an endometrial biopsy and culture.
samantha my mare (before i bought her)had a foal at 9years and then was sent back to stud every year untill she was 20 she never took i bought her at 20 and shes now 23 and infoal from a yearling colt (escaped his field into mine) the people who used to race her told me she was barren she was very under weight when i got her she had been left in the field from the age of 9 lived out all winter with no shelter, rugs or extra feed other than grass for 11 years was only looked after properly when she went to stud. since ive had her shes much happyer lives in through the winter and has lots of feed.
i believe shes infoal because she happy healthy and gets lots of attention and has a stress free life plus she was bred naturaly in a field with no one watching they were left to get on with it.
i think you should keep trying she must be happier now i think that helps
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