It is not. There are a number of things a father or anybody really can do to help a mother manage her pregnancy. IMO the more a person does, the more invested they are in the pregnancy even though they aren’t the one physically carrying the fetus. The more invested they are, the more they stand to lose if the pregnancy is terminated. The more they stand to lose, the more relevance their opinion has at least under a harm-avoidance analysis (which I suspect you use).
@Broomstick: I’m not arguing that the father’s investment outweighs the mother’s rights with this line of discussion, which began “Even if you think the mother deserves the final say […]”. I am responding to k9bfriender who seemed to argue that nobody else’s opinion was even relevant.
The topic is, why are you pro-choice, not merely are you pro-choice. So I’m trying to learn why you think the only person whose opinion on an abortion is relevant is the person carrying the fetus.
I suspect you are using a harm-avoidance analysis (utilitarian nonmaleficence). Assuming the unborn is incapable of being harmed, the mother probably stands to suffer the most harm if she is forced to carry her pregnancy to term. Therefore the decision is hers.
But I don’t generally like putting words in other people’s mouths, you might have your own rationale.