Fourth OB/GYN Appointment

I'm starting to wonder what the purpose of these appointments are. Eman and I had to miss class and all they did was listen to its heart. I feel like its being fiddled with uneccesarily. They wanted me to have another ultrasound, but I declined. I asked the doctor if using the doppler was necessary, and she said that it was. I'm really getting worried about all the high frequency soundwave exposure. I know its safe for the pregnancy, but what about the long term effects on its potential intelligence? Bleh. I'm scheduled again next month.