Why should a woman have to give birth to an unwanted child?
While there are unwanted pregnancies, there truly are no unwanted children. Even if a pregnant woman does not want to raise the child growing in her womb, someone else does. There are many more couples seeking to adopt than children available for adoption.
But even if a child were “unwanted,” it would still be wrong to kill them for not being wanted—just as it would be wrong to kill a child already born if her mother decided she no longer wanted her.
Moreover, no woman really wants to have an abortion. An unwanted abortion is no solution to an unwanted pregnancy.