What does N/N mean?

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What does N/N mean?

This is a discussion on What does N/N mean? within the Horse Colors and Genetics forums, part of the Horse Breeds, Breeding, and Genetics category

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    06-26-2012, 10:35 AM
What does N/N mean?

Hey, I'm new to this forum and I want to learn more about horses and breeding...I came across this term and I was wondering what it meant?
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    06-26-2012, 10:43 AM
It's usually referring to horses who are Impressive bread and potential carriers of HYPP. N/N means they do not carry the gene. H/H or N/H means they are carriers of HYPP since the gene is dominant.
    06-26-2012, 10:46 AM
Horse HYPP
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    06-26-2012, 10:47 AM
I'm not sure that it only refers to HYPP, but yes, it means the horse is double negative for a disease. N/N is a good thing.
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    06-26-2012, 10:47 AM
Thanks!! So is HYPP fatal?
    06-26-2012, 10:49 AM
N/N isn't only in reference to HYPP but that is where you see it the most.

As to HYPP being fatal... yes the seizures can kill a horse, or cause complications that require the horse to be humanly euthanized, but in and of itself it is not considered "fatal" but extremely dangerous as there is no way to predict attacks.
    06-26-2012, 10:51 AM
Is there a cure?
    06-26-2012, 11:03 AM
No there is not.
    06-26-2012, 11:05 AM
Okay thanks! :)
    06-27-2012, 01:12 PM
When I tested my mare for HERDA, it came back as N/N. So, it can be for different problems.

n/n, pedigree

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