Contraception was illegal in Ireland from 1935 until 1980, when it was legalised with strong restrictions, later loosened.^[1] The ban reflected Catholic teachings on sexual morality.

The encyclical Casti connubii (1930) followed the industrial production and widespread use of condoms that usually prevent fertilisation. It specified:

any use whatsoever of matrimony exercised in such a way that the act is deliberately frustrated in its natural power to generate life is an offence against the law of God and of nature, and those who indulge in such are branded with the guilt of a grave sin

— Casti connubii

Following the marketing of "the pill" in the 1960s, a Pontifical Commission on Birth Control was set up. It has often been cited that there was a majority in favour of contraception, and that is implied in the wording of the papal encyclical.^[2] The encyclical Humanae vitae (1968) decreed that artificial contraception is not morally permissible.^[3]

Owning and using contraceptive devices and pills was not prohibited under Irish law. However, from 1935, it was illegal to sell or to import them.^[4] During this time a loophole was used, where a device such as a condom could not be "offered for sale", but a citizen could be "invited to treat" to buy it. Also people made donations to family planning associations to obtain contraception as a "gift". The reality for almost all of the population was that contraception was unobtainable. Few outlets wanted to stock a product that could bring the attention of the police or public opprobrium.

In early 1971 Senator Mary Robinson (later president of Ireland) sought to introduce a bill to liberalise the law on contraception into the Seanad, but it was not allowed a reading, so it could not be discussed. On 31 March 1971, a number of supporters managed to get into the grounds of Leinster House and then broke into the building to register their protests.^[5] On 22 May 1971 a group of Irish feminists, including Mary Kenny, travelled to Belfast by rail and made their return to Dublin Connolly, laden with contraceptive devices, into a statement on the illogicality of the law. This provoked criticism from the Catholic Church; Thomas Ryan, Bishop of Clonfert, said that "... never before, and certainly not since penal times was the Catholic heritage of Ireland subjected to so many insidious onslaughts on the pretext of conscience, civil rights and women's liberation".^[6]

In 1973, the Supreme Court determined in McGee v. The Attorney General that there was a constitutional right to marital privacy which also allowed for the use of contraceptives. A number of bills were proposed, but none became law. A government bill, the Control of Importation, Sale and Manufacture of Contraceptives Bill 1974, was defeated in a free vote, with Taoiseach Liam Cosgrave among government TDs voting against it in a free vote.

A later Taoiseach, Jack Lynch, admitted at one point that the issue had been put "on the long finger".^[when?] The Health (Family Planning) Act 1979 limited the provision of contraceptives to "bona fide, family planning or for adequate medical reasons".^[7] Under this scheme, contraceptives could only be dispensed by a pharmacist on the presentation of a valid medical prescription from a practising doctor. The legislation did not require that the recipient of the prescription be married; however "bona fide family planning" would have made non-marital use unlikely to be authorised.

The legislation had been introduced by Charles Haughey. The reason for the compromise was the strong position of conservative elements in Irish society at the time, particularly the Catholic Church, which made it difficult for the government to provide for a more liberal law. Contraception was also not seen by politicians as a vote-getter at the time. Haughey described the 1979 Act as "an Irish solution to an Irish problem". Eileen Desmond, TD, was severely critical of the legislation; describing it as hypocritical, she argued that women should make their own decisions on such matters, and contended that the Irish people and "those who have conditioned our consciences' showed greater moral concern on sexual matters than in addressing poverty".^[8] On 1 November 1980 the Act came into operation by order of the minister.^[9]

The Health (Family Planning) (Amendment) Act 1985^[10] liberalised the law by allowing condoms and spermicides to be sold to people over 18 without having to present a prescription; however sale was limited to categories of places named in the Act. The Health (Family Planning) (Amendment) Act 1992^[11] repealed Section 4 of the 1979 Act, as amended in 1985, and continued the provision of contraceptives without prescription, allowing sale to individuals over the age of 17. As of 2010, the 1992 Act and the Health (Family Planning) (Amendment) Act 1993^[12] are the main Irish legislation on contraceptive and family planning services.^{[needs update]}

As well as allowing sales, Ireland's censorship laws had to be reformed to allow contraceptives to be advertised or even mentioned. As late as 1976, the Censorship of Publications Board had banned the Irish Family Planning Association's booklet "Family Planning". The Health (Family Planning) Act 1979 deleted references to "the unnatural prevention of conception" in the 1929 and 1949 censorship Acts, thus allowing publications with information about contraception to be distributed in Ireland. The Regulation of Information (Services Outside the State for the Termination of Pregnancies) Act 1995 modified the 1929, 1946 and 1967 Acts to allow publications with information about "services provided outside the State for the termination of pregnancies".

As of January 2023, there are more than a dozen contraceptive choices available in Ireland including the daily pill, condoms and more long-term methods such as the coil.^[13] Contraception, contraceptive consultations, appointments, prescriptions and any other costs are now free for 17- to 26-year-olds under the Government's free contraception scheme.^[14] There are medical professionals available who can guide you through your options and help you find the most appropriate method of contraception for your needs.^[15] For those who are not covered by the scheme, a contraceptive consultation costs €60 (or €45 if you are a student).^[16]

The Eighth Amendment to the Irish constitution which prevented abortion was repealed in 2018.

A small percentage of the Irish population still opposes the use of artificial contraception within marriage, in line with Humanae Vitae, including sports personality Mickey Harte.^[17][18]

• Irish Family Planning Association