Humanae vitae

(Latin, meaning '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. Provided by Wikipedia