Pope John Paul II

Thus the Church condemns as a grave offense against human dignity and justice all those activities of governments or other public authorities which attempt to limit in any way the freedom of couples in deciding about children. Consequently, any violence applied by such authorities in favor of contraception or, still worse, of sterilization and procured abortion, must be altogether condemned and forcefully rejected. Likewise to be denounced as gravely unjust are cases where, in international relations, economic help given for the advancement of peoples is made conditional on programs of contraception, sterilization and procured abortion.

Apostolic Exhortation Familiaris Consortio of Pope John Paul II
To the Episcopate
To the Clergy and to the Faithful of the Whole Catholic Church