You may have misunderstood her question.
And -- if you ever do have a deaf or HOH child -- listening to ALL options IS the first step.
A geneticist can look into possible hereditary causes of your husband's deafness with some blood tests. We had it done for our child, given that she was adopted, we had no family history, and we wanted to know if there were any of the common syndromes associated with deafness to consider.