|
|
Post by Welshcob92 on Apr 29, 2014 17:13:45 GMT
Can anyone tell me wether a blood test for pregnancy is 100% accurate? I'm asking as I have a mare who was covered late June last year, and believed to be in foal - never returned into season, she's huge now where as usually when coming out of winter she drops loads of weight. We never had her scanned, and this is not an option for her without sedation. Her mood has changed for the worse since been covered, turned into a total cow bag! We had her blood tested - and it came back negative I have been told that they only test for live foals, and I'm convinced there's something in there  |
|
sarahp
Happy to help
Posts: 9,510
|
Post by sarahp on Apr 30, 2014 6:16:27 GMT
It always used to be said that if positive it definitely was, but if negative it still could be positive, but this is only the "word on the street", I don't know if there are any proper studies to that effect and the blood test could have changed in the mean time.
Sounds as if she could be in foal, any changes to the udder? If she's a maiden mare there might not be anyway, they can do it all at once last thing. What's wrong with waiting to see what happens, it's not long now?
|
|
|
|
Post by Welshcob92 on Apr 30, 2014 7:18:42 GMT
I think the udder has enlarged slightly, I'm using photos day to day now to record any changes to her udder and body.
There's nothing wrong with waiting, apart from the fact I'm terribly impatient with everything - and I want to know if there's any hope she could be infoal.
Thanks for your advice
|
|
|
|
Post by Louise Dixon on Apr 30, 2014 19:57:54 GMT
This is a bit vague, but I am sure my vet told me that it is only reliable for a certain section of the pregnancy, before or after that period you could get a false negative. Sorry I can't remember more clearly.
|
|
|
|
Post by kaybrook on Apr 30, 2014 20:54:40 GMT
It's pretty accurate after 120 days of pregnancy, and fairly inaccurate before that... Not sure when you blood sampled her?
|
|
kareen
Junior Member
Posts: 90
|
Post by kareen on Jul 21, 2014 9:37:55 GMT
It depends on the test. Right after conception Progesterone is used and that can bear false results especially when you don't know 100% when ovulation has occurred. Between d40 and 100 PMSG can be used and is pretty accurate however, elevated levels only tell you the mare conceived while Estrone Sulphate test (useful from d55 but only certain after d110 and until short before delivery) will also tell you the fetus is intact and alive. One problem is that if you do not have the accurate ovulation day you can't be sure which day of gestation you're looking at. Most studfarms still record only the day of breeding resp. insemination which is a bit useless as the pregnancy can't start 'cooking' before ovulation so ovulation time is what you really want to know  Hope helps. |
|
