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WeeFoal 38 test

Equine-Reproduction.com Bulletin Board » Breeding Problem Mares - Volume 2 » WeeFoal 38 test « Previous Next »


Author Message
 

Becky Schulz
Weanling
Username: Becky

Post Number: 24
Registered: 06-2006
Posted on Sunday, November 08, 2009 - 02:33 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Wondering if anybody has tried the new WeeFoal 38 test (tests from day 38 - 120) and what your experience is? Any false positives?
 

Jos
Board Administrator
Username: Admin

Post Number: 2652
Registered: 10-1999
Posted on Monday, November 09, 2009 - 06:09 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

This test tests for the presence of equine chorionic gonadotropin (eCG, aka PMSG), which is produced by the endometrial cups commencing in the region of 36 days post-conception. The problem with testing for eCG is that if the mare loses the pregnancy after the formation of the endometrial cups, in most cases eCG secretion will continue until regression of the cups occurs around 90-120 days. This means that the mare will still test "pregnant" using such a test, even though there is no longer a foal on board.

Please also note that blood tests as a whole do not determine presence or absence of a twin, and should therefore not be considered a replacement for ultrasonic evaluation.
 

Becky Schulz
Weanling
Username: Becky

Post Number: 25
Registered: 06-2006
Posted on Monday, November 09, 2009 - 09:54 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thanks, Jos. That's what I was wanting to know. I tested a miniature mare who should have been around 111 days when tested this weekend. She had been looking somewhat larger by late Sept but I was out of town for 12 days until Oct 5 and since that time, she does not look pg to me. Hence the reason for testing. She is too small for my vet to ultrasound/palpate.

The WeeFoal company is going to send me the second test (120 - 300 days) to test her. Do you believe I can get an accurate result with that test and should I wait longer (than 120 days)before testing?
 

Marilyn Lemke
Senior Stallion or Mare
Username: Marilyn_l

Post Number: 2272
Registered: 06-2007
Posted on Monday, November 09, 2009 - 12:45 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I have a question for anyone who can answer this. I have a Wee Foal kit,the one that's 120 days + and it's expired since April of this year. Do you think it's still good, even if it's expired?
 

Becky Schulz
Weanling
Username: Becky

Post Number: 26
Registered: 06-2006
Posted on Monday, November 09, 2009 - 09:08 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I'm working with Susan at WeeFoal and I hope I can get a definitive answer. I'm likely going to test this mare again with the 120 test.
 

Jos
Board Administrator
Username: Admin

Post Number: 2653
Registered: 10-1999
Posted on Tuesday, November 10, 2009 - 08:06 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

The estrone sulfate test is less likely to give a false positive, but should really be used after a 120 days for maximal reliability.

Can't answer the expiration date question accurately. Expiration dates are put on for a reason... sometimes there is a genuine degradation of ingredients that will lead to failure or response (with whatever you're dealing with), while other times it might just be a regulatory requirement. In order to play safe though, respect expiry dates.
 

Marilyn Lemke
Senior Stallion or Mare
Username: Marilyn_l

Post Number: 2281
Registered: 06-2007
Posted on Tuesday, November 10, 2009 - 02:35 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thank you Jos for answering my question. In the meantime, I got a response from the WeeFoal company and this is what she said regarding using an outdated product...

If you use the outdated product and get a pregnant signal then she most likely is - as the test is set up to trigger the ES hormone at a certain level if it is present. If the hormone is not there, the test will not show pregnant however, you are correct in wondering about the negative signal or no signal due to test unit age.

I am sorry the packet expiration date is past. These tests are set up for about a 15-18 month of activity as long as they are kept refrigerated and sealed in their packet. 12 months from the manufacturing date is when the lab sets the expiration date which is actually shorter than the 15-18 month period. You might just fall into the "safe"time.

Just thought I would post this in case anyone else was wondering...
 

Michele
Breeding Stock
Username: Mich

Post Number: 157
Registered: 02-2006
Posted on Monday, December 07, 2009 - 09:19 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Marilyn, I have successfully used the WeeFoal test many times long after the expiration date (12 months thereafer!) and had a 100% correct result. It is imperative however that the test has been stored correctly i.e. in the fridge.

Out of interest, I have also used the test well after the 300 day guarantee - right up until my mare foaled at 345 days. Some mares will continue producing the hormone until just before or after foaling.

For information straight from the horse's mouth so to speak, contact Dr Keith Henderson in New Zealand - the actual developer of the test.
 

Marilyn Lemke
Senior Stallion or Mare
Username: Marilyn_l

Post Number: 2293
Registered: 06-2007
Posted on Monday, December 07, 2009 - 01:21 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thank you so much Michele. This is good to know. I'm putting Dr. Henderson in my contact info, for future questions. Thanks again!
 

Marilyn Lemke
Senior Stallion or Mare
Username: Marilyn_l

Post Number: 2294
Registered: 06-2007
Posted on Monday, December 07, 2009 - 01:24 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I did not store the old test in the refrigerator like it said to, but it still came back with the same results as the new one I purchased. "Pregnant" Yea!!! lol
 

Michele
Breeding Stock
Username: Mich

Post Number: 158
Registered: 02-2006
Posted on Tuesday, December 15, 2009 - 01:04 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

That's great Marilyn!! You've got a house the right temperature to store WeeFoal test obviously:D



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