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Intracardiac injection for twin reduction

This category is to be used for general mare questions that are not covered by other category descriptions.

Moderator: Jos

Intracardiac injection for twin reduction

Postby Miranda » Fri Jun 26, 2015 12:12 pm

I have an 11 year old mare who double ovulated after being bred with cooled shipped semen. At day 15 preg check the vet found twin vesicles, right next to each other at the base of the right horn. She was unsuccessful in getting them to separate enough to manually crush one. Returned the next day to try again and they were " right on top of each other" and once again would not move. We had a specialist from the closest vet school go out yesterday ( day 18) to get a second opinion. She feels there is a only a very small chance that one will reduce on its own because they are almost identical in size. Her recommendation is to wait until day 90-100 and attempt to inject the heart of the twin with the least room with penicillin. She said we would have a 50/50 chance at getting one healthy foal with this method. I am wondering around how much this procedure would cost, and what are the odds of still getting an undersized foal because placentation of both twins would be so advanced at 100 days? I do not want to spend a lot of money to get an unhealthy foal if we should just terminate this pregnancy and try again next year. If the foal is born small, but otherwise healthy, would it eventually catch up to the size of its genetic potential? One other problem could be that they are right on the cusp of being in the uterine body instead of the horn.
Miranda
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Re: Intracardiac injection for twin reduction

Postby Jos » Mon Jun 29, 2015 11:16 am

You will have to ask the attending veterinarian what the cost for the procedure would be. I will say however that "throwing in the towel" this early is unusual.

Placentation in the equine does not commence until around the 40th day after conception and is not completed until about the 140th day, so it is unlikely that there would be a significant issue related to fetal size - the more so as 60% of fetal growth occurs in the last 3 months of pregnancy.

Personally, I might consider seeking another opinion elsewhere, or using prostaglandin to short-cycle the mare, and start again with the breeding process, but this time evaluating the mae earlier for pregnancy... ;)
We're always happy to try and help, but don't forget to check the articles section
of the website too, which has a search engine to help you look for answers!
:)
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