All-Party Parliamentary Group on Primodos
A cross-party group of MPs and Peers

Working for answers and justice for Primodos families.

The All-Party Parliamentary Group on Primodos brings together MPs and Peers from across the political spectrum to support families affected by hormone pregnancy tests and press for recognition, accountability and redress.

Primodos was an oral hormone pregnancy test given to women in the UK between 1958 and 1978. Affected families report pregnancy losses and children born with serious congenital disabilities. For decades, they have campaigned for their experiences to be acknowledged and their questions properly answered.

The APPG ensures their case remains before Parliament. Since its formation, its members have secured five debates through the Backbench Business Committee, as well as raising Primodos through early day motions and parliamentary questions. This work helped build the political pressure for successive government-commissioned reviews, including the Independent Medicines and Medical Devices Safety Review.

Today, the Group examines the scientific and regulatory evidence, holds the Government and medicines regulators to account, and presses for the relevant recommendations of the IMMDS Review, including redress, to be implemented in full.

The Association for Children Damaged by Hormone Pregnancy Tests acts as the Group’s secretariat, helping to keep the experiences and priorities of affected families at the heart of its work.

In brief
1958–1978
Years Primodos was prescribed in the UK before withdrawal
~1.5m
Women in Britain given the drug as a pregnancy test
70+
Cross-party MPs and Peers currently members of the APPG
Latest

Latest News

Andy Burnham speaking in the House of Commons chamber
14 July 2026

Andy Burnham raises Primodos in first Commons speech after returning to Parliament

In his first Commons speech since returning to Parliament as MP for Makerfield, Andy Burnham told the House: “We think tonight of the Primodos families, who have fought so hard for fairness.” Five days later, he became Prime Minister.

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APPG members at a committee room meeting at Westminster
7 July 2026

APPG welcomes Dr Louise Newson for discussion on hormones, women’s health and patient safety

The APPG held its Annual General Meeting in Parliament, chaired by Yasmin Qureshi MP, joined by GP and hormone specialist Dr Louise Newson for a wide-ranging discussion on hormones, women’s health and patient safety.

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Yasmin Qureshi MP and campaigners outside court holding the IMMDS review report
January 2026

Our work on the Hillsborough Law

Yasmin Qureshi MP has tabled an amendment to the Public Office (Accountability) Bill so that a future Primodos panel would carry the same statutory protections as other investigations.

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Cover of Joanne Briggs's book The Scientist Who Wasn't There
July 2025

The scientist who wasn’t there: fraud at the heart of the Primodos scandal

A new memoir by Joanne Briggs reveals her father, Professor Michael Briggs, fabricated his qualifications while acting as Schering’s expert witness on Primodos. The APPG is calling for an independent audit of the studies he supplied.

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Professor Bengt R. Danielsson
March 2025

New scientific review concludes hormone pregnancy tests were teratogenic

A peer-reviewed study by Professor Bengt R. Danielsson and Associate Professor Helen E. Ritchie concludes hormone pregnancy tests meet established criteria to be classed as a human teratogen, challenging the 2017 Expert Working Group’s findings.

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All-Party Parliamentary Group on Primodos

APPGs are informal, cross-party groups of MPs and Peers with no official status within Parliament or the Government. This site is maintained by the Group’s secretariat.

© All-Party Parliamentary Group on Primodos.