How is it puzzling? The basis for the pro-life argument is pretty clear cut. Pro lifers believe that
a) It is wrong to terminate a life unless in self defense.
b) Life begins at conception.
I don't think there should be any haziness on why people are pro-life. If you don't think men have the right to complain, then by that argument, they shouldn't have the right to complain if the mother shoots the baby in the head the second she gives birth. I mean, after-all she's the one that "went through the whole ordeal". Just playing devil's advocate here. I'm not going to give my opinion on the subject.
The argument takes total sense. It's just a matter or whether or not you believe that a fetus is "enough" of a life.