He has NO legal rights whatsoever in any way shape or form when it comes to you and the birth of your child. He cannot demand to be there. He cannot dictate anything to do with the birth at all. It is your body, your choices, your rights. Don't let him scare you, he sounds like a completely abusive and controlling BS artist - I wouldn't listen to a word he says, because he obviously has no idea of what he is talking about.