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Troublesome mare...

Equine-Reproduction.com Bulletin Board » Breeding Problem Mares - Volume 2 » Troublesome mare... « Previous Next »


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Regena B-It's a BOY
Weanling
Username: Callawayssuzy

Post Number: 29
Registered: 04-2008
Posted on Monday, April 20, 2009 - 11:34 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hi all. I posted here last year just before my mare was due (and subsequently foaled). That foal was her second foal, and all went well with him. This is a mare that we have not ever succeeded in getting in foal while she has a foal by her side-- this includes last season. We bred her via AI three cycles last season to no avail. She did manage to hang onto one pregnancy for a time, but she lost it around 25-30 days post-breeding. Note that this mare has been diagnosed by a vet to have chronic decreased progesterone levels during her pregnancies, so we do keep her on Regumate (I have read all the articles and both her vet and I feel that this is a good option for her--- she was tested on multiple, consecutive days with low levels each time). She also has had multiple early-term abortions in the past, primarily when concieving her first foal. On her second foal, we bred her once and used the Regumate from the beginning--- she had no problems and carried that foal to term.

Fast-forwarding to this season. We started her under lights in December, and she began cycling in February. For her March cycle we had a complete reproductive exam done-- everything came back clean and ready to breed. We bred her on her April cycle. We had ultrasounded her with a 36mm follicle on Thursday- got the semen and inseminated on Friday (she had already ovulated when we inseminated). Checked her at 16-days-- an embryonic vesicle was present but it was only at size ~10mm. Vet was also concerned about another small spot (~4mm) that looked to be a twin, but he couldn't be sure. Obviously concerned about the pregnancy, we decided to check her in a week. We conducted the second ultrasound today, expecting the worst. We were somewhat surprised-- It has increased in size to ~20mm, which looks (from what I read and from what the vet said) to be only about 5mm off of where it should be. The 'twin' is shrinking in size, now appearing at only ~2mm. The vet was able to locate the embryo at one end of the sac and he said he saw a developing allantois. The mare is still on Regumate. I guess my question is-- obviously we should continue to monitor the viability of the pregnancy, but since the mare is on the progesterone should I be worried about keeping a questionable pregnancy? Could the presence of a 'twin' have caused the slight developmental delay of the conceptus? Any possible insight would be appreciated- thank you.

She has another appointment at about the 45-day mark...



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