Christians have always condemned contraceptive sex. Both forms mentioned in the Bible, coitus interruptus and sterilization are condemned without exception (Gen. 38:9–10, Deut. 23:1). The early Fathers recognized that the purpose of sexual intercourse in natural law is procreation; contraceptive sex, which deliberately blocks that purpose, is a violation of natural law.
Every church in Christendom condemned contraception until 1930, when, at its decennial Lambeth Conference, Anglicanism gave permission for the use of contraception in a few cases. Soon all Protestant denominations had adopted the secularist position on contraception. Today not one stands with the Catholic Church to maintain the ancient Christian faith on this issue.
How badly things have decayed may be seen by comparing the current state of non-Catholic churches, where most pastors counsel young couples to decide before they are married what form of contraception they will use, with [...] quotations from the early Church Fathers, who condemned contraception in general as well as particular forms of it, as well as popular contraceptive sex practices that were then common (sterilization, oral contraceptives, coitus interruptus, and orally consummated sex).
Many Protestants, perhaps beginning to see the inevitable connection between contraception and divorce and between contraception and abortion, are now returning to the historic Christian position and rejecting contraceptive sexual practices.
It should be noted that some of the Church Fathers use language that can suggest to modern ears that there is no unitive aspect to marital intercourse and that there is only a procreative aspect. It is unclear whether this is what some of them actually thought or whether they are intending simply to stress that sexual activity becomes immoral if the procreative aspect of a given marital act is deliberately frustrated. However that may be, over the course of time the Church has called greater attention to the unitive aspect of marital intercourse, yet it remains true that the procreative aspect of each particular marital act must not be frustrated.