I think I went to every two weeks after my 28 week appointment, so at 30 weeks? I'll be 36 weeks next week, after that they want to start seeing me once a week.
Same as a lot of these gals - my 28 week is late, not til the 28th, so I'll be 29+3, but I know I have to go back at 30 weeks and every two until 35 or 36 weeks. Between that and my diabetes monitoring, I feel like I'm always at their office! I love them, but they're an hour from my work, so it's a major inconvenience.