Just wanted to start with some hugs, because I think you need them.
Well I think he's the one being the baby. You'e offered him the chance to be a part of this baby's life and if he then decides at a later date he made a mistake - he will already have missed out on some of the most precious moments - he can never have those back.
Don't tell im when you go into hospital, but maybe a text after the baby is born - or perhaps a short letter and a photo of "his baby daughter" thank him for giving her to you and let him know that to see her all he had to do is call. And then leave it, get on with your life, and remember he's the one missing out. Her first breath, her first cry, her first smile, her first step - if he misses those feel sorry for him, he has missed out on something magical.
I would always leave the door open for him to be involved, no matter how idiotic he is being, that way he can never use the excuse that you wouldn't let him. The information is there is he wants it, but if he doesn't make any effort I wouldn't volenteer information.
As for the birth certificate, if you know he is the father surely it is your choice to name him or not?
Keep holding your head up high lovely, you sound like you're going to be a great Mum.
