This is taken from Is Abortion Really So Bad? by Dr. Joel Beeke, a pastor, theologian and seminary professor.
What is the justification for legal abortion? Let us examine the arguments used by those who promote abortion to determine on how strong of a foundation this practice is based.
Private Matters Into Which We Must Not Intrude
We believe that human sexuality is a very private matter: it expresses the deep intimacy that a husband and wife share. But sex has very public consequences. How we exercise our sexuality contributes to the restraint or spread of disease, the treatment of women with honor or rape, the nurture or sexual abuse of children, and the strengthening or dissolution of families which are the foundation of society. Society therefore has a compelling interest to guard the dignity of marriage, women, and children with respect to sex and reproduction.
People sometimes argue that the U.S. Constitution guarantees the right to privacy in sexual and reproductive matters. Read the Constitution, and you will not find any such right there. In reality, the Fourth Amendment acknowledges the right of security against “unreasonable searches and seizures” without a “warrant,” but says nothing about sexuality, children, or abortion.
Someone might sarcastically say, “I thought what I did in my bedroom was my own business.” But if there is reasonable cause to believe that you are murdering a child in your bedroom, then it becomes a matter of public intervention by the authorities. Privacy is not an absolute moral right. But killing a child is an absolute moral wrong.