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Problem mares

Equine-Reproduction.com Bulletin Board » Breeding Problem Mares - Volume 1 » Problem mares « Previous Next »


Author Message
 

Glenna Bartlett
Neonate
Username: Aloha_liquor

Post Number: 1
Registered: 05-2005
Posted on Wednesday, May 25, 2005 - 09:49 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Have two mares that we tried repeatedly to settle A/I shipped semen. Biopsied, culture & cytology..treated and had clean mares. Palpation and U/S to order semen, gave hCG, inseminated, flushed until no fluid on U/S. One stallion was 50+% motil at 24 hours, and one was 30% or less at 24 hours. Any suggestions?
 

Pat Wiles
Neonate
Username: Tajsultani

Post Number: 6
Registered: 06-2005
Posted on Friday, June 03, 2005 - 10:02 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Some mares just don't settle AI - it requires a really good tech to determine when to inseminate - some mares actually ovulate AFTER they are technically not showing heat, so you may be missing them by 24-48 hrs. Are these mares maidens? Maybe want to try hand cover first time, then do AI the next?
 

Jos
Board Administrator
Username: Jos

Post Number: 10133
Registered: 10-1999
Posted on Saturday, June 04, 2005 - 12:10 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Some mares if they are not managed correctly will not settle after AI... :-)

One of the differences between live cover and AI in many cases is of course that the mare never gets to see the stallion (transported semen etc.). When the mare is teased by the stallion, she releases low levels of oxytocin, and that assists in clearing the pre- or post-breeding uterine fluid if present. If the mare is not teased (because she is being bred AI with no stallion around), then there is the possibility with some mares (delayed uterine clearance mares) that they will not clear the fluid present, and then endometritis will occur and the pregnancy not be established or maintained. Indeed, the same thing may happen with some of these mare if there is a stallion present to tease them!

The use of a an efficient oxytocin protocol can change the whole outcome with many if not most of these mares.

If a mare is not conceiving with use of AI, it's not because of the AI, it's because something else is either not being done and should be, or is being done and shouldn't. Remember that when a stallion breeds a mare, he doesn't deposit the semen in the mares vagina - he inseminates it himself directly into the uterus. In some cases the stallions penis will enter the uterus, in most cases it will penetrate the cervix to some extent during breeding, and even if his penis remains in the vagina, it is pressed so closely to the cervix, that the pressure of the ejaculation results in the semen being forced immediately into the uterus.

So AI isn't exactly an un-natural process, it's more a modification of the natural process! :-)



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