Not taking the cortisone will lower chance of being able to have any children but people that take their medication do have children if there isn’t any other medical conditions or factors.

There is something called adrenal rest that is talked about here and has to do with furtility  http://www.caresfoundation.org/news_letter/spring03_page_7.htm  

Also, this is a story that everyone with CAH should read along with medical proffesionals learning about CAH. It’s about a Guy that didn’t take his medication either and doesn’t ever get to wait for any doctor anymore or anything else.  http://www.geocities.com/Heartland/Canyon/7906/index.html