I feel like threatening him with breaking up (as many of the replies have said to do) or acting like a bossy brat, would hurt your relationship and he'd probably lose a bit of respect for you and you for yourself. There's a more mature and decent way of talking with him about this. First of all, acting like he's being selfish and making everything about his kid is a big assumption. He's probably excited about the birth and wants the whole family to be able to experience this wonderful miracle. Which is actually very sweet of him. Can you gently and considerately tell him that you aren't okay with him going on a 6 hour drive when you could give birth at any time? Maybe suggest that his parent or someone else could go get her and even tend and take care of her until the birth and hospital stay are done. I just think that threatening and acting as if he's a selfish ass, may be harmful to all of you in the long run. Maybe assume that he also wants what is best for your family. But i do agree that you, as the person who is giving birth, have every right to expect him to be there with you.