With my first pregnancy I had the normal 3 ultrasounds. No one ever mentioned him being big. He ended up being 9.9lbs.
With the second, I switched OBs. Due to me being on the smaller side (115lbs) she has sent me to get ultrasounds every 6 weeks. At 34 weeks my baby was already 7lbs, and she is projected to be 10 lbs at birth.
My son was delivered naturally, I intend to deliver this one naturally, if she is 9.9 or smaller. If she ends up being 10 lbs, they will do a C-section. I'm being induced 1 week early to avoid this, but go in for a scan tomorrow to get final measurements. (I am 38 + 2, scan will be at 38 +3, and I have a planned induction at 39 weeks).