Is it true.... - The Horse Forum
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post #1 of 9 Old 05-20-2010, 12:46 AM Thread Starter
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Is it true....

that thoroughbred mares are more prone to having twins? I was doing a little research on breeding tb's, and read that they are extremely prone to throwing twins. Is it more common in tb's? Or is common in all breeds?


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post #2 of 9 Old 05-20-2010, 12:56 AM
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I don't know about the statistics in specific breeds, but my understanding is that its very rare in general. Most twin births involve at least one foal fatality, if not both of them.

When I was 15 the place where I rode had a mare foal twins. One was still born, and the other had a severely compromised immune system. He lived to be about a month old and then died.
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post #3 of 9 Old 05-20-2010, 01:57 AM
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I have no idea if TB's are more likely to have twins, however the only mare I know/knew (she died in a freak trailering accident where she somehow ripped her face off in the trailer) that had given birth to twins was a TB. One foal died, the other lived but is only about 13hh (she's 7 or 8 years old now) when the mare was about 16hh.

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post #4 of 9 Old 05-20-2010, 02:08 AM
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I don't know. Of the horses I personally know that have had twins, one was an arabian (both foals were normal sized and grew just fine), 2 Paints (one was checked early and one was pinched, the other one had two live foals, but one died shortly after birth), and one Appendix QH (both foals were still born).
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post #5 of 9 Old 05-20-2010, 04:43 AM
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Not sure about whether it's more common in TB's, but I owned a twin out of a tb mare by a wb stallion.
Her twin died (could have been saved with a simple operation but lets not go there) but my girl lived on quite healthily. I brought her when she was 4, and other than only being 15.1h when he sire was 17h and her dam 16.1h, she was fine... I thought.
I lost her in a freak paddock accident, her front cannon snapped completely in a compound fracture and all that was left holding her lower leg on was a flap of skin and fur. An immense amount of force would have been required for a horse to get an injury that bad, there wasn't a mark on her from a fall, nothing on the ground etc. so I think she may have had weakened bones due to being a twin.
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post #6 of 9 Old 05-20-2010, 09:20 AM
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As far as I know that's really rare no matter the breed. My friend's paint mare had twins, though both were born about 2 months early and stillborn though they were born on the aproximate date the they were supposed to be.
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post #7 of 9 Old 05-20-2010, 01:39 PM
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Yes, it's more common in TBs
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post #8 of 9 Old 05-21-2010, 11:35 AM
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I don't see how that would be possible. I don't want to say no but all breeds have particular breed genetic pre-dispositions. I've worked with mostly thoroughbreds most of my life, and I have never heard this before.
I really don't understand what would make them more prone to it.

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post #9 of 9 Old 05-21-2010, 08:42 PM
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I can't remember where I read this, so I could be wrong, but I'm pretty sure I once read that drafts were the most prone to twins.
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