I was 30 weeks at my last appoint and she said she wanted me fortnightly. My preg has been prob. free like previous two and was tempted to do another 4 weeks but have to have 32 weeks scan re renal pelvis dialation so thought I had better stick to her schedule. I think it can depend on the Dr. If it was me I would maybe go back at 36 weeks(4 wk from last appoint) just to ease my mind. Do you have to be tested for group strep which is usually done around 36 weeks?