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ET and older mare -Jos?

Equine-Reproduction.com Bulletin Board » General Mare Questions - Volume 2 » ET and older mare -Jos? « Previous Next »


Author Message
 

Michele Sakurai
Neonate
Username: Sakura_hill_farm

Post Number: 1
Registered: 11-2007
Posted on Thursday, November 29, 2007 - 05:32 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

We have 20 yr. old mare that successfully had an ET in 2000. She has not since been bred. We will have a full repro exam done in January, including biopsy. I will ask my vet in January ( a nationally known repro vet) but to help my planning, I would appreciate it if Jos could answer three questions.
1) is there any advantage to using fresh over fertile frozen AI?
2) will doing an ET procedure early in the season have a negative effect on the chances of pregnancy in a subsequent cycle in the same season?
3) is there any advantage to doing ET over having her carry?

Thank you
 

Jos
Board Administrator
Username: Admin

Post Number: 1641
Registered: 10-1999
Posted on Thursday, November 29, 2007 - 11:10 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

1) is there any advantage to using fresh over fertile frozen AI?

It will depend somewhat on the mare herself. With older mares, a common problem is delayed uterine clearance. In some instances with this condition there is a greater post-breeding inflammatory response with the use of frozen semen than with cooled. In any event close post-breeding management will be a worthwhile investment.

2) will doing an ET procedure early in the season have a negative effect on the chances of pregnancy in a subsequent cycle in the same season?

Assuming standard cleanliness and ET procedures are maintained, no.

3) is there any advantage to doing ET over having her carry?

It again depends upon the mare. If she has a poor biopsy score, the chances of a successful ET may be greater than her carrying her own foal.



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