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Hearing Impairments

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Genetic tests ?

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  3287.1
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  7/30/2006 3:04 am

What baffles me is this testing. We had genetic testing before my son was born ( and he is HOH) we had it for other reasons and never did hearing come up then as an issue. ( or would it have been an issue for keeping the pregnancy)
Can any test tell you past a 25% chance you will have a deaf or HOH child? And what is the benifit of knowing that?
My sons audioligist has told us she recomends our sons blood to be drawn for a gentic test, but again why?
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Genetic tests ?

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  3287.2 in response to 3287.1
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  7/30/2006 10:40 am

Hello, and welcome.

I'm not very "up" on the genetics of hearing loss, but of what I have heard, the gene responsible for a certain type of hearing loss is "recessive" which means that both parents have to be a carriers, and give this gene simultaneously at conception making it a "dominant" gene and hence the trait becomes "visible".  If you and you significant other had genetis testing and this marker was found in both of you and was recessive then the chance of passing it on was %25 at most!!  If only one of you had the marker, then there was NO CHANCE of passing it on.  So, in short, if neither one of you had the marker (or just one) then your child's hearing loss was not "passed on" and may be a complication of another genetically inheritable condition.  This is why hearing loss was not mentioned (since hearing loss may not always happen).  Hope this helps.  How is your son doing?  How old is he?  Will he require any hearing aid(s)/CI (s)?  We would love to hear back from you.  Keep in touch.

Maria :)                

~~How very softly you tiptoed into my world, and only a moment you stayed, but what an imprint your footsteps left upon my heart. ~~

~~A part of you has grown in me, and, so you see, it's you and me, forever, and never apart;  maybe in distance but never in heart~~

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