At which week in pregnancy do you start having weekly appointments? And what do they do ?

My ob is having me come in weekly after I reach 36 weeks

I started weekly at 27 weeks and it's the same normal check up and they start checking your cervix for dilation

37 weeks I meant

I don't think I do till 38. I'm only 33 weeks now and I don't see her till 37 weeks agian

I started at 36

really, 35

I started at 34