It is rare but it could be that you or your husband has NCCAH.  If it’s so than the one of you who has it has a classical and a non classical gene while the other one is only a carrier of a classical gene.  Both your children got one classical gene from the parent who is only a carrier and from the other parent who is affected one got the classical and the other the non classical gene.  It’s rare since if one of you has NCCAH with one classical gene you would most likely be symptomatic and know about it already.  But there is a lady who used to post over here who also only found out that she has NCCAH after two of her children where diagnosed, one with classical and the other with NC CAH.

Another option is that both have the same genes but geneotype doesn’t always match phenotype.

If your baby was diagnosed through new born screening and wasn’t born virillized and there was no crisis then maybe she also really only has NCCAH and was miss diagnosed with another type.  (I don’t want to get you excited for nothing but I heared it happen already.)

Or it could be that your son is just an early bloomer and you are getting worried a little too quickly (like I would) because of the bad experience you had with your baby.

In any case, check it out and do DNA on the entire family if possible.   

Risty