question about genetic testing

[Guest guest]

I've been reading the posts here for a few months and I am interested

in how some of you know how you or your children became affected with

a Mito disorder. At present we have not been able to confirm a

" reason " for Abbey's Complex I. Did the geneticist test you or your

child? We know there is nothing apparant in the cell nucleus but they

won't rule out a genetic cause. How rare is a spontaneous mutation?

The specialist gave us a 15% chance af another child being affected

but I'm still unsure and would like to know for our sake and for

Abbey's.

Thanks for any help!