Diff doctors start at diff times.
28 weeks is when I'm starting mine
I'm starting biweekly at 28 weeks.
I started my bi weekly appointments at 24 weeks as well. I'm not high risk of anything, it's just what my doctors office does.
I just had a Dr's appt today and they put me on bi-weekly appts as well. I'm high risk though.
My doc starts at 30 weeks