Joan, Sorry if I put you on the spot. That's what you get for being so smart and caring. I can NOT say that I understand it completely myself as when the geneticist called to tell me she was a bit rushed. And as I always say, "how do you know what questions TO ask if you don't know what questions you SHOULD ask? I will try to explain it as I understood it, but that doesn't mean it's right. There ARE two CAH type genes in every child born with CAH. There are 8 known strains/types of CAH, classic, non-classic, late onset, 17, etc. The genetic testing should be able to identify 2 CAH genes by running the tests and matching them up against the 8 known strains. In my case, we were able to clearly identify the severe salt wasting CAH gene, and since I am only a carrier I only have one CAH gene. They also were able to identify this same severe salt wasting CAH gene on my son. The problem came when they tried to find the match for my husband and the second gene for my son. It didn't identify as any of the 8 known CAH genes. I believe she referred to it as blank. So, the questions remains: 1) Was the test faulty? If so, it would have to have been faulty on both my husband's tests and my son's tests. 2)Is there another form of CAH that hasn't been identified as yet? If so, what's the next step? 3)Is there any possible danger for my son by not knowing the identity of this gene? If so, what the heck do I do about it besides have a nervous break down????????4)What in the world do I do next to figure this whole thing out? If anybody has any ideas for me please feel free to pass them on no matter how far fetched they may sound. Thanks for listening.