Big brother to be at first dr appt?

Staci
My son, 6 yr old, is really really excited to be a big bro. My 1st appointment is July 14th. He asked if he can come with us to see his baby bro/sister. We of course said yes, but now I'm having second thoughts. What if something goes wrong or it freaks him out. Any ideas or experiences with you first born at the ob with you?