Argument: Cloning undermines the natural relationship between procreation and family
Wayne Jackson. "The Ethics of Human Cloning". The Christian Courier. April 30, 2001 - "Human beings were designed to be a part of a family relationship – involving a loving father and mother. The “family” unit existed from the first day of man’s existence upon the earth (Gen. 2:18ff; 4:1). Children are to be introduced into earth’s environment as a part of this protective and stable arrangement. God never intended for people to be cranked off an assembly line like so many pieces of machinery. This is such a fundamental principle that even the most obtuse ought to recognize it."
taught by the Catholic Church in the instruction issued by the Congregation for the Doctrine of the Faith in 1987 known as Donum Vitae. - "[A]ttempts ... for obtaining a human being without any connection with sexuality through 'twin fission', cloning or parthenogenesis are to be considered contrary to the moral law, since they are in opposition to the dignity both of human procreation and of the conjugal union."