K, fwiw, my OH did not attend. A) I was unprepared for him to see me that way and b) I felt that it wasn't worth him missing work for a ten minute procedure. My mom came to drive me, but even that I didn't think I needed. After, I waited about an hour, then met my co workers out for lunc - drove myself and I thnk we went bowling or something. I know the anticipation can be nervous, but IMO, if you don't want OH to miss work and he can't go, I think it will be ok.
Along that same note, I'm pretty terrified for OH to watch me deliver a baby. Perhaps that sounds shallow, but I've seen the pictures; I'm not sure I want many people to see me have a human head sticking out between my legs except medical professionals. It scares me.