I didn't make a specific appt, but at my annual exam, when I knew DH and I were going to start trying soon, I mentioned it to my OB/Gyn. He actually did a blood draw to check and see if I was a carrier for any genetic diseases and I believe did a measles/rubella titer. I was clean on the genetic front; I assume that if I wasn't, a screen for DH would have been in order.
i considered our chat to be beneficial, and would at least call and leave a message to see how your doc likes to handle it.