Hello, We have a mare that has had three normal healthy foals for us. One by AI two by live cover. We liked the first foal so much we decided to try AI again this past season. She was ultrasounded at 52 days and the vet found no foal.
Since then she developed some lameness issues and we were relieved she was indeed not in foal. Now five months after she was inseminated she is begining to look like she might be in foal after all.
I would not pretend to be an expert on ultrasounds, but I do remember looking with the vet while he performed the ultrasound seeing no indication of a foal.
We do not have any local vets that have ultrasounds and it is an ordeal to get one done, otherwise I'd try. But, also, it seems most unlikely that we could have missed the diagnosis. Is it at all possible to miss a 52 day fetus? -perplexed
Posted on Saturday, January 18, 2003 - 02:33 pm:
You can confirm pregnancy by having your vet do a estrone sulfate blood test. My mare was missed on an ultrasound, so another vet recommended this test which was done at cornell university. It measures the estrone sulfate (hormone) produced by the fetoplacental unit. It can be done after 90 to 100 days and will tell you if the mare is pregnant and if the foal is viable.
Posted on Saturday, February 01, 2003 - 08:34 pm:
The test you recommend would not suit this mare; the owner said it has been five months since she was bred (150+ days).
I personally know of three cases where vets missed a pregnancy, but all three were ultrasounded before 30 days. I would think it would be hard to miss a 52 day embryo, but if it was a rookie vet, I suppose anything is possible. It could even be your mare is just fat...at five months most mares don't "look" pregnant. Best course of action for now -- don't worry about it till spring. If the mare starts showing signs of estrus that might give you an indication (although mares come in heat when they are pregnant as well sometimes). By seven to eight months the vet should be able to feel the foal. Good luck!
Posted on Saturday, February 01, 2003 - 08:49 pm:
An estrone sulfate assay is the best way to determine the pregnancy status of this mare.
Estrone sulfate is secreted by the fetoplacental unit between about days 70 and 300, with levels peaking at about day 210. Consequently a blood-assay indicating the presence or absence of estrone sulfate in this mare will answer the question!
Hi All, I have a 6 year old maiden Appy mare. Last year there was no question when she was in heat. This year only once have I seen her squatting,peeing, and winking. So after a regimate regimine ending 5-4, she was given a lutylase shot on 5-5. It was horrific. She cramped so bad that she would be on her hind toes and almost collapse to the ground. This went on for almost 2 hours. NEVER AGAIN. On 5-9 she was ultrasounded with a right 32 follicle. 5-11 she was ultrasounded at a 38 and AI'd, and was given a shot to bring on ovulation. 5-12 she was ultrasounded at a 30/32 and AI'd. 5-31 she was palpated and ultrasounded and showing no foal. Now I am waiting for her to come into heat again. Nothing showing today. Am going to check twice a day for the next few days for her cycling. The stallion owner says that when the follicle dimminished to the 30/32 that she was absorbing it and didn't ovulate. I am between the devil and the deep blue sea. Is this true? The vet said that he had never seen this happen before. The stallion owner says that I shouldn't haul into the vet and to have the vet come to the barn, to alleviate the stress. The vet is only 10 minutes away. Hope that someone has some insight in this. Thank you, Sandy
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