Hi Kate,

No, my sons are very much fraternal.  To the extent that, one has straight hair and deep brown eyes just like my husband and the other curly locks that are actually getting more wavy with bright green eyes like me!  BUT, if you put a hat on them they could almost pass for identicals hee.. hee..!

As far as I understand it, identical multiples are genetically the same.  You know the whole concept of one egg spliting making them exactly the same.  Therefore, with identicals they both would either have or not have CAH.