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Triple split heat ???

Equine-Reproduction.com Bulletin Board » Breeding Problem Mares - Volume 1 » Triple split heat ??? « Previous Next »


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TrueColoursFarm
Posted From: 24.215.60.231
Posted on Thursday, June 19, 2003 - 07:57 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I have one young mare that is my "problem child" mare - 5 yr old TB mare.
This is a mare that will show to the stallion or an interested gelding for 30 days out of every month, will stand to be bred for 20 days straight (even with no follicle in there!) and is, in general - so darned tough to figure out without a vet in attendance to do an ultrasound literally every morning.

We last covered her on May 31st, and checked her yesterday (day 18 post ovulation) to see if she was in foal.
Not only was she NOT in foal, she had a large CL that looked like it had ovulated 3-4 days ago, and another one at about 34mm on the other side that will be breedable today/tomorrow.

We are trying to figure out if she triple split her initial cycle??? (which I have never heard of) or had her 2nd cycle 12 or 13 days after her first one which seems equally bizarre!

Any insight would be most appreciated!
 

Jos
Posted From: 142.177.8.41
Posted on Thursday, June 19, 2003 - 10:10 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

In all probability what your mare is exhibiting is not estrus (heat) at all, but submissive behaviour.

I would put the mare on P&E (see the article here on the web site) which will pinpoint estrus in 90%, and ovulation in 80%, of cases to the day if you combine the protocol with hCG use. The great advantage is that you can start it anywhere in the mare's cycle unlike other estrus-controlling drugs. This means that you will minimize the need for veterinary intervention, and indeed, maybe do away with it completely.
 

TrueColoursFarm
Posted From: 24.215.60.231
Posted on Thursday, June 19, 2003 - 01:49 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Jos - that might be a serious consideration!

We tried breeding her at 3 yrs, and thought she was just hormonally not mature enough yet, so left her alone, covered her once at 4 years of age, she conceived and then aborted a perfectly normal looking foal at 8+ months.
This time, we did get the vet in several times through her last cycle, bred her on the day indicated, checked the next day and she had ovulated (so she did have a breedable follicle going on in there). NO indication whatsoever of another follicle in there, or a split heat happening.

So - when we checked her at 18 days, and she had that big CL in there from a few days ago on the right and another follicle in the works on the left sitting at 34mm, it was ???? What the heck is going on in there???

I think I will be very happy when this breeding season is finally over ...
 

Jos
Posted From: 142.177.79.48
Posted on Thursday, June 19, 2003 - 08:31 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Mares are the only mammal that can and will ovulate in the face of elevated progesterone levels, so the development and ovulation of a "mid-cycle" follicle is not unusual, and probably explains the CL presence you outline above.

I wouldn't particularly label this mare a "problem mare" based on what you have written, merely one that has to be managed intensely.



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