Unlike abortion, the prohibition against artificial birth control has never be widely accepted by the Bishops of the Church over all. There small majority accepted Humanae Vitae while a minority said it was not infallible and the Bishops should stay out of the bedrooms of married couples.
In fact, the commission Pope Paul VI set up to study ABC, found that there were moral justifications for married couples to use it. Under advice from his handlers, the Pope rejected the commission's report, for they feared that it would undermine the authority of the papacy.
Jim
Birth Control
In 1968, Pope Paul VI issued his landmark encyclical letter
Humanae Vitae (Latin, "Human Life"), which reemphasized the Churchs constant teaching that it is always intrinsically wrong to use contraception to prevent new human beings from coming into existence.
Contraception is "any action which, either in anticipation of the conjugal act [sexual intercourse], or in its accomplishment, or in the development of its natural consequences, proposes, whether as an end or as a means, to render procreation impossible" (
Humanae Vitae 14). This includes sterilization, condoms and other barrier methods, spermicides,
coitus interruptus (withdrawal method), the Pill, and all other such methods.
Birth Control
Whoa doggy. I dont know where you got that idea Jim, but if a wayward Bishops proposes something different - always read the sources of the Pope.
AND if that isnt enough - time you read the earlier renderings of the fathers.
Apostolic Tradition
The biblical teaching that birth control is wrong is found even more explicitly among the Church Fathers, who recognized the biblical and natural law principles underlying the condemnation.
In A.D. 195, Clement of Alexandria wrote, "Because of its divine institution for the propagation of man, the seed is not to be vainly [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse], nor is it to be damaged, nor is it to be wasted" (
The Instructor of Children 2:10:91:2).
Hippolytus of Rome wrote in 255 that "on account of their prominent ancestry and great property, the so-called faithful [certain Christian women who had affairs with male servants] want no children from slaves or lowborn commoners, [so] they use drugs of sterility or bind themselves tightly in order to expel a fetus which has already been engendered" (
Refutation of All Heresies 9:12).
Around 307 Lactantius explained that some "
complain of the scantiness of their means, and allege that they have not enough for bringing up more children, as though, in truth, their means were in [their] power . . . or God did not daily make the rich poor and the poor rich. Wherefore, if any one on any account of poverty shall be unable to bring up children, it is better to abstain from relations with his wife" (
Divine Institutes 6:20).
The First Council of Nicaea, the first ecumenical council and the one that defined Christs divinity, declared in 325, "If anyone in sound health has castrated himself, it behooves that such a one, if enrolled among the clergy, should cease [from his ministry], and that from henceforth no such person should be promoted. But, as it is evident that this is said of those who willfully do the thing and presume to castrate themselves, so if any have been made eunuchs by barbarians, or by their masters, and should otherwise be found worthy, such men this canon admits to the clergy" (Canon 1).
Augustine wrote in 419, "I am supposing, then, although you are not lying [with your wife] for the sake of procreating offspring, you are not for the sake of lust obstructing their procreation by an evil prayer or an evil deed. Those who do this, although they are called husband and wife, are not; nor do they retain any reality of marriage, but with a respectable name cover a shame. Sometimes this lustful cruelty, or cruel lust, comes to this, that they even procure poisons of sterility [oral contraceptives]" (
Marriage and Concupiscence 1:15:17).
The apostolic traditions condemnation of contraception is so great that it was followed by Protestants until 1930
The Magisterium
The Church also, fulfilling the role given it by Christ as the identifier and interpreter of apostolic Scripture and apostolic tradition, has constantly condemned contraception as gravely sinful.
In
Humanae Vitae, Pope Paul VI stated, "[W]e must once again declare that the direct interruption of the generative process already begun, and, above all, directly willed and procured abortion, even if for therapeutic reasons, are to be absolutely excluded as licit means of regulating birth. Equally to be excluded, as the teaching authority of the Church has frequently declared, is direct sterilization, whether perpetual or temporary, whether of the man or of the woman. Similarly excluded is every action which, either in anticipation of the conjugal act, or in its accomplishment, or in the development of its natural consequences, proposes, whether as an end or as a means, to render procreation impossible" (HV 14).
This was reiterated in the
Catechism of the Catholic Church: "[E]very action which, whether in anticipation of the conjugal act, or in its accomplishment, or in the development of its natural consequences, proposes, whether as an end or as a means, to render procreation impossible is intrinsically evil" (CCC 2370). "
Legitimate intentions on the part of the spouses do not justify recourse to morally unacceptable means . . . for example, direct sterilization or contraception" (CCC 2399).
The Church also has affirmed that the illicitness of contraception is an infallible doctrine: "The Church has always taught the intrinsic evil of contraception, that is, of every marital act intentionally rendered unfruitful. This teaching is to be held as definitive and irreformable. Contraception is gravely opposed to marital chastity, it is contrary to the good of the transmission of life (the procreative.aspect of matrimony), and to the reciprocal self-giving of the spouses (the unitive.aspect of matrimony); it harms true love and denies the sovereign role of God in the transmission of human life" (Vademecum for Confessors 2:4, Feb. 12, 1997). 
I'm interested...
