In the absence of a mutual decision confirmed as such by both parties about whatever the woman decides to do with the pregnancy, the man should be able to abdicate himself from responsibility for said decision.
It is incredibly hypocritical to claim that women should be free to control their bodies, but men should have their finances or lifestyle controlled because of someone else's decision. It paints men's freedom as less important, and it also paints women as incapable of handling their own freedoms.
Honestly, I'd be terrified if I were a man. Getting fixed might have been a little easier, but nothing is perfect. I make sure to tell my partners from the outset of any sexual relationship that I have already decided what I would do, he can't change my mind, and he has no responsibility to do anything should that ever happen. He accepts that and stays, or doesn't and leaves. Since he can't decide what to do after the fact, I give him an opportunity to decide before the fact.