BEFORE going to see specialists ..... answer me this ....
HOW are you "trying"? Is she charting her cycle? She should start charting to see when she is fertile. Women are fertile about 4 days out of the month - the couple days leading up to ovulation and the day of ovulation. Once ovulation occurs, the egg lives about 24 hours (and that is being generous) and fertilization is no longer possible.
Read
www.fertilityfriend.com for more info.
If she is NOT charting - I bet you are timing sex ALL WRONG and THAT is the problem - not the plumbing.
Ask me for more info if you need - I know more about trying to conceive than one should know. lol