I don't know how manyI was allowed, but it was just me and my hubby. I liked it that way. Then we told everyone else together. It was such a special moment that I'm glad only he and I share.
It depends on the place.
I just had my mom and boyfriend with me but their was like 5 seats and the room was pretty big at Lawrence General in Mass. Some places are really crammed tho so you would need to find out how big it is and how many people the doctor would mind.
Yeah it does depend on the place that is why I am doing a 3d/ 4d u/s so I can have my kids and like a total of 20 ppl in the room with me if I wanted. But I think it will just be us.