Fee, i would not tell them your not trying, id say you are seriouslly TTCing and want to do some prelim research :-$ im sure they will be ok with this. You probably wont get to talk to the OB, only his/her reception area but i found they are quite knowledgable at all this stuff too. Give it a try with one or two of them and see how you go, you dont have anything to lose