What's the guide for visiting obgy from first trimester to edd?

I start my appt with kkh week 5, week 7. My next appt is week 9. Can I delay to week 11 or 10? Is it normal for appt every 2 weeks. But each appt is just scan (ok normal) when consult doc they don't talk much and jus ask me take folic acid. They don't check blood? If I enuf hormone o etc? This is my 3rd conceive. previous 2, was a lost. I'm worried.