32 week appointment

Another appointment.....Everything is going well-the heartbeat was about 136 which is about where it has been for the past several months. I measured at 37 weeks today which is nothing new, we are thinking about the necessity of another ultrasound if they tell me I need to have one--every time I've had one the results have been the same and there haven't been any problems. So would it really be worth going through another one just because I keep measuring "big".