I have a healthy 9 year old Trakehner mare, who I am trying to breed to my Welsh stallion. We have tried to breed her 5 times in the past, once when she was 4 years old, and four times when she was 7 years old. The only serious thing she has ever had is Pigeon fever as a yearling.
Uterine biopsy was fine.
We had hoped that the reason she wasnt getting pregnant had to do with maybe she was having a reaction to the semen extender. So, last time we bred her we collected my stallion, and inseminated her right away. No semen extender used. We bred her on a 46mm follicle (I beleive, will have to check the records for sure), and it seemed as though it couldn't have been better timing.
As far as the appearance of her uterus on the ultrasound, it appears a bit smaller than the other mares, but thats really the only thing that the vet has noticed.
On Sunday she was in heat, standing heat, but the ultrasound showed no decent follicles. We collected the stallion and bred her anyways because her cervix was open. We plan to breed her again tomorrow.
Are there any ideas as to what could be causing this, or any other approaches I can take if this doesnt work?
Jan Owen Senior Stallion or Mare Username: 1frosty1
Post Number: 1415 Registered: 04-2006
Posted on Tuesday, April 15, 2008 - 03:49 pm:
Samantha~ I had a mare who was a maiden at age 12. There appeared to be no reason we could not get her pregnant with everything being perfect. We finally discovered that she had clearance issues and needed to use oxytocin protocol. http://www.equine-reproduction.com/articles/oxytocin.htm
That worked for her that time and we followed it the next 2 times we bred.
Have you bred to any other stallion with this mare? If not, then there may be an incompatability issue with the stallion.
Have you confirmed ovulations in this mare? One pair of items that you mention that rings alarm bells is the "small uterus" and "no decent follicles". If you have never identified an ovulation in this mare (or possibly even if you have - especially if there are small ovaries) then you may want to check her karyotype as sometimes one can have a chromosomal imbalance, and end up with an "intersex mare", which has a strong tendency to be infertile.
If neither of the above apply, then try the oxytocin protocol that Jan mentioned above. It's a good place to start!
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