Hello, congratulations on your pregnancy!!
This is entirely your choice and only you know what is best! I always said that it is wrong for mums not to let dads have access to baby unless they are abusive/violent, however, reading this, I just kept thinking that he doesn't deserve to be a part of baby's life when they arrive, if he's making no effort beforehand. This isn't just your pregnancy, it's his too and he should be caring for you throughout, even if you aren't together.
I'd speak with the people who know you best, your family, friends etc. If this was me, I would be very straight to the point and tell him that if he wants to be at the birth and on the birth certificate, he will come to all the appointments, and will contribute his 50% (money and emotionally) now and after the birth.
This is a bit deal and one that only you can make, but I hope this helps xx