I think it depends how far along you are when you go. If you're more than 10 or so weeks (maybe even 8) they'll try and find the heartbeat, though often they can't find it until 12+. We had a midwife, and our appointments were all around an hour long, if you're with an OB it might be different. If I remember right, they'll talk about prenatal vitamins, diet, exercise, answer any of your questions, maybe get a baseline weight. They'll probably want to know any symptoms you're having and then assure you they're all normal.
