Portugal Reverses Gender Self-Identification Law

On 27 March 2026, Portugal’s parliament approved three bills at first reading that roll back the country’s 2018 self-identification law. The proposals, submitted by the coalition of PSD, Chega and CDS-PP, reintroduce medical assessment for adults seeking to change their legal sex registration and largely exclude minors from that option. In 2018, Portugal was one of the first EU member states to allow legal sex registration to be changed solely on the basis of a person’s own declaration — without a diagnosis or waiting period. It is now also one of the first to reverse that approach.

From diagnosis to self-declaration — and back again

The history of Portugal’s law clearly illustrates this shift. A 2011 law still required a medical report from a multidisciplinary team, including a diagnosis of gender dysphoria, before a person’s legal sex registration could be amended. In 2018, a left-wing parliament under then Prime Minister António Costa — now President of the European Council — replaced that requirement with a system based entirely on self-declaration. Since then, changing one’s legal sex has become an administrative formality. That is precisely what the current right-wing coalition identifies as the problem: a decision with far-reaching consequences being made without any independent assessment.

The figures that fuelled the debate

According to figures cited by Genspect in its coverage of the debate, the number of registrations before 2018 averaged three per week. By 2025, that had risen to around ten per week, and by early 2026 to 63 per month — an increase that Genspect puts at 425 per cent, with a striking proportion involving girls changing their registration to male. These figures come from an organisation that is itself a party to the debate, not from independently verified government statistics; we therefore present the claim as something Genspect used in an attempt to persuade parliament, not as an established fact. What is clear, however, is that the rising numbers themselves have become part of the political debate over whether self-declaration without any form of assessment is sustainable.

Parents and detransitioners at the hearing

Since the spring, the bill has been in the “speciality stage”: the parliamentary Committee on Constitutional Affairs has been hearing detailed testimony from more than thirty parties, ranging from doctors and psychologists to LGBT representatives — and, for the first time, explicitly from parents and detransitioners. Journalist Marisa Antunes describes how members of the support group “Youth in Transition” appeared before the committee to speak about what they call irreversible harm arising from the combination of the self-identification law and the WPATH guidelines followed in Portuguese public hospitals. The fact that a parliamentary committee is giving these voices a structured place is itself a break with the way the debate has been conducted in most European countries so far.

What is at stake, beyond Portugal as well

After the speciality stage comes a final vote; if the law is passed, President António José Seguro — who, as a former PS politician, is not certain to view it favourably — will have to sign it or send it back. Genspect describes the case as a possible precedent for the other EU member states with a comparable self-identification system. This is more than Portuguese domestic politics: the question of who gains access to women’s categories on the basis of a self-declaration is relevant in virtually every country where self-identification has been introduced or is under consideration. zelfidentificatie.nl also explains how Austria brought self-identification in through the back door, via an equal-treatment law — Portugal now shows the opposite: a country explicitly trying to close that door again through the front door.

A pattern, not an isolated incident

Portugal is not alone. From the Cass Review in the United Kingdom to NHS England’s retreating course, institutions that previously embraced the affirmative model unconditionally are revising their positions one by one. The same movement is also visible in American higher education, where universities are revising their curricula under pressure. What connects these cases is not ideology but a recurring question: did the policies of the past decade actually stand up to scrutiny, or were they implemented too quickly and with too little oversight? Portugal is now answering that question with a parliamentary majority.

Sources

Marisa Antunes, “Portugal May Repeal Self-ID Law and Set a Precedent Across the EU”, Genspect (24 June 2026). Online: genspect.substack.com. See also: “Parliament Moves to Roll Back Gender [Law]”, Portugal Decoded (27 March 2026). Online: portugaldecoded.substack.com.