Humanae vitae (Latin: Of Human Life) is an encyclical written by Pope Paul VI and dated 25 July 1968. The text was issued at a Vatican press conference on 29 July. Subtitled On the Regulation of Birth, it re-affirmed the teaching of the Catholic Church regarding married love, responsible parenthood, and the rejection of artificial contraception. In formulating his teaching he explained why he did not accept the conclusions of the Pontifical Commission on Birth Control established by his predecessor, Pope John XXIII, a commission he himself had expanded.
Mainly because of its restatement of the Church's opposition to artificial contraception, the encyclical was politically controversial. It affirmed traditional Church moral teaching on the sanctity of life and the procreative and unitive nature of conjugal relations.
It was the last of Paul's seven encyclicals.
In this encyclical Paul VI reaffirmed the Catholic Church's view of marriage and marital relations and a continued condemnation of "artificial" birth control. Referencing two Papal committees and numerous independent experts examining new developments in artificial birth control, Paul VI built on the teachings of his predecessors, especially Pius XI, Pius XII and John XXIII, all of whom had insisted on the divine obligations of the marital partners in light of their partnership with God the creator.
Paul VI himself, even as commission members issued their personal views over the years, always reaffirmed the teachings of the Church, repeating them more than once in the first years of his Pontificate.
To Pope Paul VI, marital relations are much more than a union of two people. In his view, they constitute a union of the loving couple with a loving God, in which the two persons generate the matter for the body, while God creates the unique soul of a person. For this reason, Paul VI teaches in the first sentence of Humanae Vitae, that the "transmission of human life is a most serious role in which married people collaborate freely and responsibly with God the Creator.