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When to ultrasound?

Equine-Reproduction.com Bulletin Board » Breeding Problem Mares - Volume 2 » When to ultrasound? « Previous Next »


Author Message
 

sharon selby
Neonate
Username: Cowpunk

Post Number: 1
Registered: 08-2010
Posted on Saturday, August 14, 2010 - 12:19 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I have inseminated my Connemara mare twice this breeding season with no pregnancy, and I think the problem is that she is a somewhat silent heat mare and doesn't show estrus (that I can see, and I only have a teaser gelding, no stallion) until the day before ovulation, too late to order shipped semen. She does appear to be following a 19 day ovulation cycle though. If she follows this pattern again she should ovulate Aug. 24. I can recieve semen the day after ordering it, it arrives at the local airport at 8pm. Ideally, what day/ days should I ultrasound in order not to miss this ovulation? Thanks!
 

james
Nursing Foal
Username: Rolomaxi

Post Number: 13
Registered: 05-2009
Posted on Tuesday, August 17, 2010 - 05:46 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Ideally ultrasound every other day once she is in estrus. Once the follicle reaches 3.5cm with maximum uterine oedema inject corulon. Order semen the same day as injecting corulon. Inseminate the next day. The majority of mares ovulate within 48hrs of corulon injection.
Silent heat is probably not an issue as the gelding is not teasing like a stallion would.
 

sharon selby
Neonate
Username: Cowpunk

Post Number: 2
Registered: 08-2010
Posted on Wednesday, August 18, 2010 - 10:41 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

You are right, the gelding that she likes (she nickers to him) seems afraid of her and ignores her when she is close to him, and she has no interest in the other geldings.
We used chorulon with the first insemination, but although she had a 34-38 follicle, I don't think she had great oedema. Also my vet gave the chorulon at the same time as insemination, instead of 24 hrs before insemination. We did give the second dose of semen 24 hours after the first, followed by oxytocin ... no pregnancy.
 

sharon selby
Neonate
Username: Cowpunk

Post Number: 3
Registered: 08-2010
Posted on Monday, August 23, 2010 - 12:51 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

We ultrasounded today even though she hasn't shown signs of estrus yet. The vet found several firm 3 cm follicles and one 3.3, no estral folds, cervix closed. Uterus had no fluid and poor uterine tone. It has been 17 days since she showed estrus and at that time the vet found a c.h. confirming ovulation. The vet is concerned about the poor uterine tone - her tone has been poor every ultrasound. I know she should have no tone when she is in estrus, but when she is in late diestrus, what should her tone be? What would poor tone indicate?
 

james
Nursing Foal
Username: Rolomaxi

Post Number: 14
Registered: 05-2009
Posted on Monday, August 23, 2010 - 04:14 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

It could be that she is in early estrus, ie. loss of tone , 3cm fol. Ultrasound every second day until uterine oedema/ softening of the cervix will allow you to monitor progress.



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