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Discussion on Inseminating, HCG, and Regression
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Member:
Kiptah
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Posted on Friday, Apr 11, 2003 - 3:58 pm:
Help. I am wondering if anyone has any advice. My 6yo Arab mare was put under lights in Dec. and then put on 14 days regumate, followed by a lutayse shot. On the 6th day following Lut shot, she was only at a 32 and teasing hard. We had ordered the semen a bit early as she teased hard all weekend and decided to inseminate her and check her the following day. Day 7, she was 34, follicle soft, fluid, DrOpped uterus. We inseminated again and ordered semen for the next day.
Day 8, she was at a 38.5. We only had one vial of semen. She didn't appear that she would ovulate overnight, so we chose to check her in the morning. Day 9 (this morning) at 8AM we checked her and her follicle had regressed to a 36. We are now into it 10 days following Lutalyse shot and 7 days of standing heat appearance. We decided to inseminate her and gave her an HCG, hoping it would encourage her to ovulate. We didn't order more, as the vet said, that multiple inseminations can cause a reaction to develop from the extender. We will check her tomorrow to see if she has ovulated or the follicle regressed. Any suggestions? My vet and I are really sitting on the fence on this one. What are the chances of the follicle ovulating, once they appear to have regressed? Does the HCG at this late in the game, encourage this? Hmm. What else could we be doing.
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Moderator:
DrO
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Posted on Friday, Apr 11, 2003 - 6:21 pm:
Hello Amber,
I have not heard of the problem with muliple inseminations and extender, does your vet have a reference for this?
I assume you have a normal cytology. I am afraid your mare is still somewhat transitional. I suggest you let her go through this cycle and once you see her actually ovulate the next cycle will be more regular. And besides you may get lucky: she might go ahead and ovulate and settle. Also don't order the semen early next time, size of the folicle is much more reliable than number of days in heat.
DrO
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Member:
Kiptah
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Posted on Friday, Apr 11, 2003 - 7:09 pm:
DrO:
I will ask my vet for the source of the information suggesting the reaction to multiple inseminations and extender. She seems very convinced of this.
Cytology was normal, yes. The vet did mention that she didn't appear to have the signs of being transitional. I.E. Several small follicles around the dominant follicle and other signs typically noticeable in a transitional mare. She suggested that maybe the cooler weather was causing her to just poke along.
We cycled her in March using regumate and she seemed to go through a regular heat cycle, although I didn't check her to see if she had ovulated. According to the articles, using the lighting and regumate is supposed to help them shorten the first ovulation by up to 30 days. I am guessing that it just didn't happen in my case.
I am hoping that she does settle,however, I am guessing that the chances are only fair that she will ovulate with a transitional follicle even with the HCG? Would you concur.
I was trying to cut down on the expense when I ordered the semen early. My experience last year was that all my neighbors mares ovulated on day 6 or 7 following the Lutalyse at this time of year. Even with the hormones and frequent exams, this just goes to show us that only mother nature calls it. 
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Moderator:
DrO
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Posted on Saturday, Apr 12, 2003 - 10:28 am:
I can tell you from experience all mares do not ovulate dependably 6 to 7 days following lutalyse. It is time to quit trying to predict the future and just watch: she may or may not ovulate. You are right about good old mother nature, best to work with her as you cannot win against her, but that is not to say a little nudge now and then can make a little difference.
DrO
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Member:
Kiptah
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Posted on Saturday, Apr 12, 2003 - 11:43 am:
DrO: We checked her this morning day 12 following Lut. and HCG shot 24 hours ago. She is still holding onto a 36.5. Vet says she won't ovulate and will most likely regress. So, my question is this. Would it be best to wait 15 days for her to begin a new cycle (natural) or short cycle her? I don't know if the hormones would be better at this point, or just let nature run its course. I tend to think letting her cycle naturally might be better. What would you say. Thank you for all your information! Experience definitely helps for this kind of thing and I will take all the advice I can get. Thanks so much!
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Moderator:
DrO
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Posted on Saturday, Apr 12, 2003 - 5:29 pm:
I agres with you.
DrO
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