Consider the parallel to the Godhead. We can prove that God the Father and Jesus are two separate individuals by referring to the many passages that mention Jesus as the Son of God the Father. A person cannot be his own father or his own son. If God the Father is a separate individual from Jesus Christ His Son, then in the very same way and for the very same reasons a mother must be a separate individual from the son or daughter in her womb. The unborn life in the mother's womb is a human individual from conception on.
Children are a blessing, a source of happiness and joy to their parents.
Yet unborn babies are children, so parents ought to appreciate them as a blessing from God. People who have Scriptural attitudes will never kill unborn babies because they will never want to. Abortion is the grossest form of ingratitude for God's blessing. A steward is a person who has been entrusted with something that belongs to someone else. He is responsible to care for that item and use it to accomplish the purpose of the one to whom it belongs.