Hi, Today one of my mares aborted a foal, going via info on the internet I think he was approx 170 days gestation. I live in Queensland Australia and I have approx 15 broodmares who run on 200 acres. As the weather is warm and the land is lush the mares free range until they are close to foaling. For this reason it is difficult for me to work out which mare has aborted the foal and to know the gestational age of the foal. I would really appreciate some advice. Does anyone know how long a mare would continue to show symptoms or discharge after delivery at this gestation. The foal appears to be perfectly formed, he has a tuft of hair on the end of his tail and is definitely a little colt. Would there much difference in the size of this aborted foal if the mum was a 15hh or a 13hh pony. I have taken photos of the foal, when I found him he was completely in his sac but the placenta was delivered separately, any advice would be great Thanks
After aborting at ~170 days, there may be few residual signs. As you are aware, the fetus is not that large, so it's passage through the birth canal is not particularly traumatic for the mare. There may be a slight difference in size between larger and smaller mares, but the general mare-variance could make that difficult to determine (i.e. some mares are going to have slightly larger foals anyway even if they are smaller, and vice versa). Bottom line? Unless you get lucky, there probably isn't much of a way to determine which of your mares aborted without doing further diagnostics (blood/urine test; ultrasound/palpation).
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