Puberty Blockers Clinical Trial

Scott Arthur Excerpts
Monday 23rd March 2026

(1 day, 8 hours ago)

Westminster Hall
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Scott Arthur Portrait Dr Scott Arthur (Edinburgh South West) (Lab)
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I believe that a trial for puberty blockers is necessary, and I am hopeful that the issues raised between the MHRA and King’s College can be resolved to allow the PATHWAYS trial to go ahead. If not, I hope an alternative trial can be proposed. I believe that if we accept that trans people exist and have rights, which I think—or at least hope—everyone here does, such trials are a natural consequence.

I understand the concerns the people here and outside this place have about the long-term medical impacts of puberty blockers. That is why we should act cautiously and it is why a trial is needed. We cannot possibly understand the short or long-term impacts without studying puberty blockers properly. The PATHWAYS trial came about because of a lack of conclusive evidence on the use of those drugs. The answer is not to allow their legal use again, but to undertake a trial into their benefits and consequences.

Not long ago in my constituency, I met the parents of a trans woman. Their daughter struggled significantly with her mental health during her teenage years. At one point, she was hospitalised due to complications from a severe eating disorder, which was driven by her decision to reduce her calorie intake because she thought that would delay puberty. Her parents have told me that they believe a big cause of her issues was her inability to express her true gender identity. They have no doubt that puberty blockers would have saved her from some of the anguish that she has experienced. While I know life is not always easy for her, my constituent’s daughter has since medically and socially transitioned; she lives openly as a woman and is happier as a result.

That story shows the profound impact that a struggle with gender identity can have on a young person. It is offensive to talk about young people simply needing love, to talk about trials being experiments, or to suggest that taking part would be an impulsive decision by anyone. People talk about trying to moderate language; we have a duty to bring people together on this topic, not create division.