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GnHR therapy on low libido stallions

Equine-Reproduction.com Bulletin Board » Hormonal Manipulation » GnHR therapy on low libido stallions « Previous Next »


Author Message
 

Anonymous
Posted From: 209.32.236.158
Posted on Sunday, February 29, 2004 - 06:53 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Is anyone here familiar with the use of GnHR on younger stallions to encourage testosterone production and increase libido? I've done some research, but haven't found a protocol for this procedure yet, and was wondering if anyone has had any experience with this.
The stallion in question is a 3 year old, with a very low libido. He's in perfect health, been vet checked for reproductive soundness, has not had any bad breeding/handling/training experiences and just seems to need a bit of further encouragement. He's shown no interest in mares in standing heat, but did tease and attempt to mount a mare last summer, but hasn't shown any interest this year.
 

D. Spink @ Exitpoint
Posted From: 209.52.192.28
Posted on Friday, May 21, 2004 - 05:56 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Have you done a test of serum testosterone levels? I'd not even consider a GnRH/HCG type product until I felt confident low testosterone was evident. Then again, I'm loathe to play with the stallion's hormonal system in general as the sword always seems to cut both ways.

Anyway, that's what I would check first.

Regards,

D. Spink
Hengststation Exitpoint
www.stallions.net
 

Peter M. Goldberg
Neonate
Username: Peterg333

Post Number: 2
Registered: 03-2009
Posted on Friday, April 10, 2009 - 11:22 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I have a 10 year old standardbred stallion who is unable (or unwilling) to ejaculate. He mounts the mount, thrusts 6 or so times and quits. Our vet did a stallion panel and found his tesosterone level (690's) and estrogen levels (100's) were very low. She has suggested a two week GNrh therapy. Any suggestions or comments on whether or not this might help????
 

Jos
Board Administrator
Username: Admin

Post Number: 2355
Registered: 10-1999
Posted on Saturday, April 11, 2009 - 02:22 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

GnRH therapy 1-2 hours before collection attempts has been used with mixed success. Before going that route, I would explore other avenues:
  • What temperature are you setting the interior of the AV at prior to collection attempts;
  • How tight do you have the AV?
  • Are you manipulating the AV and/or glans of the penis?
  • Have you tried using hot packs?
  • Is your tease mare "desirable" to the stallion"?
  • Have you tried collecting on a tease mare rather than the mount? (If he collects on a mare fine, then it's probably not a hormonal issue).
As you can see, there are a variety of other factors to evaluate/try (if you haven't already) prior to jumping on the chemical bandwagon. :-)
 

DTQH
Weanling
Username: Dtqh

Post Number: 24
Registered: 02-2009
Posted on Friday, May 07, 2010 - 05:31 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

We have a 14 year old quarterhorse stallion that has low sperm count do to him keeping his testicals tucked up. there is a scar on his scotum that we believe isn't allowing him to let them down far enough for effective cooling. Our vet tested him and found everything works well but his count is too low. He will stand next to a mare in full standing heat and mayor may not care. ...Any suggestions on treatment for sperm count or effective cooling?
 

Jos
Board Administrator
Username: Admin

Post Number: 2839
Registered: 10-1999
Posted on Friday, May 07, 2010 - 08:11 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Non-relaxation of the scrotal sac would be unlikely to impact the number of sperm produced, merely the condition they are in when ejaculated. You would be more likely to see a higher number of dead sperm (i.e. lower progressive motility).

You might want to measure the testicles and determine an estimated daily sperm output based on testicular volume, but I suspect you are going to find that his testicles are quite small. This would also correlate with poor libido (as a result of low testosterone output).

The use of Omega-3 fatty acid supplements have been demonstrated to improve sperm output and quality.

Do not use testosterone in an attempt to increase sperm output or libido. It will have the opposite effect.

Often when these boys start to get older (and >13 is classed as getting older) one starts to see an increase in problems related to fertility, including testicular degeneration.
 

hedgerow farm
Weanling
Username: Lotsofponies

Post Number: 40
Registered: 03-2009
Posted on Thursday, May 13, 2010 - 10:34 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hey Jos
"You might want to measure the testicles and determine an estimated daily sperm output based on testicular volume,"

Please tell us how, I know very carefully but really how do you measure and calculate the daily sperm output. Would this be the volume not concentration? This would give you an idea if you are getting a complete ejaculation or not, right?
 

Jos
Board Administrator
Username: Admin

Post Number: 2848
Registered: 10-1999
Posted on Friday, May 14, 2010 - 10:13 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

You are estimating potential total daily sperm output - i.e. sperm production - it has nothing to do with volume or concentration. It could be used as a rough guide as to whether you are getting a complete ejaculation, but would only be indicative of a significant failure, not a minor difference, as it is an estimation.

To achieve the estimate, measure the testicles in centimeters and use the following formulae:

Testicular Volume (TV) = 0.5233 x width x height x length
Add the two calculated volumes together to get total testicular volume (TTV) and then:
DSO (109/day) = (0.024 x TTV) - 1.26



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