Netherlands Puberty Blocker Review Comes to Opposite Conclusion, Dismisses Cass Review

Yes for some young people with persistent gender dysphoria, undergoing endogenous puberty may itself carry a risk of significant psychological harm- and those harms may be long term as many of the effects of puberty are irreversible. That isn’t a claim invented in 2026—it’s one of the central reasons puberty blockers were proposed in the first place.

simply dismissing the possibility that endogenous puberty can be profoundly distressing for some adolescents as “TRA gubbins” doesn't really contribute to a meaningful debate.

If your position is that every child should undergo endogenous puberty regardless of how severe or persistent their distress is, then explain why you think the harms of that approach are outweighed by the risks

Oestrogen will bind to the hormone receptors in the body regardless of XY karyotype and induce the development of secondary sex characteristics, as well as changes necessary for bone health and brain development, etc.

Yes for some young people with persistent gender dysphoria, undergoing endogenous puberty may itself carry a risk of significant psychological harm- and those harms may be long term as many of the effects of puberty are irreversible. That isn’t a claim invented in 2026—it’s one of the central reasons puberty blockers were proposed in the first place.

simply dismissing the possibility that endogenous puberty can be profoundly distressing for some adolescents as “TRA gubbins” doesn't really contribute to a meaningful debate.

If your position is that every child should undergo endogenous puberty regardless of how severe or persistent their distress is, then explain why you think the harms of that approach are outweighed by the risks

That’s a false analogy.

If a parent dies, there is no intervention that can bring them back. Acceptance is the only option because there is no other.

Going through endogenous puberty is completely different. We do have interventions that can alter or delay it. Whether those interventions should be used, and in whom, is exactly what’s being debated. Those interventions won't cause the child to grow new reproductive organs- that is a reality the child has to accept. but those interventions can prevent the development of secondary sex characteristics associated with birth sex , and induce those of the child's experienced sex. That can significantly alleviate a young persons distress (and can realise better outcomes and potentially less invasive interventions down the line for those for who want to pursue transition).

So your comparison is completely circular. You’re treating acceptance as the only possible response by ignoring the very existence of the medical interventions under discussion. The debate is whether those interventions are justified—not whether they exist.

In what way is a boy (male child) receiving the hormones necessary for pubertal developmental if his natural puberty is blocked and he's given oestrogen?

Transition is not possible because humans can't change sex.

blockers combined with oestrogen is not the issue, because the body is still receiving the hormones necessary for pubertal developmental. The concern is blockers without any other hormonal intervention.
surgeries can wait .

There are almost always multiple possible explanations for the same thing.

I agree. So the fact that almost all the children taking puberty blockers progressed to opposite sex hormones could be explained by a number of reasons. You believe that it's because the doctors somehow managed to select only the children who would persist in their cross-sex identity to be given puberty blockers. I suggested that it could be because puberty is often the 'cure' for gender dysphoria (this is well documented), so stopping puberty could cause the children to persist. These are both possible explanations for the observed result.

In scientific medical terms, this is usually thought of in the terms of 'this piece of evidence is consistent with the hypothesis that..." rather than saying its the only possible hypothesis.

What you call 'evidence' here seems to be the observed result, so yes, the observed result could due to either of the causes described above. Or even something else entirely.

But the observed result is not evidence that either of these causes are the true cause for the observed result.

That’s a false analogy.

If a parent dies, there is no intervention that can bring them back. Acceptance is the only option because there is no other.

Going through endogenous puberty is completely different. We do have interventions that can alter or delay it. Whether those interventions should be used, and in whom, is exactly what’s being debated. Those interventions won't cause the child to grow new reproductive organs- that is a reality the child has to accept. but those interventions can prevent the development of secondary sex characteristics associated with birth sex , and induce those of the child's experienced sex. That can significantly alleviate a young persons distress (and can realise better outcomes and potentially less invasive interventions down the line for those for who want to pursue transition).

So your comparison is completely circular. You’re treating acceptance as the only possible response by ignoring the very existence of the medical interventions under discussion. The debate is whether those interventions are justified—not whether they exist.

I think that all sounds very fair.

The only thing I would question though is whether anyone really says "you need to accept your body" to a child who is distressed about their body.

Acceptance can never be forced or demanded.

I'm someone who believes that no medical intervention is ever justified for a child with gender dysphoria. I believe that acknowledging their distress and helping them to live with it as the passage of time slowly lessens it is the support that they need. I'm not suggesting it would be easy but it's important for their physical health and overall mental health that they find a way through this distress with their body intact and free from the known and unknown risks of PBs or CSHs.

My threshold for medical intervention being potentially justified is after someone is past the age of 25, when their brain has fully completed its development through adolescence.

I would rather there was no such thing as medical interventions for any age, but if someone is over 25 and every other avenue has been explored both neutrally and fully, perhaps medical intervention is the only way forward. If an adult does take this path I would hope that they truly feel happy that they did so for the rest of their life and that they don't suffer too many medical complications (there will always be some complications resulting from cross-sex hormones being taken). I would also hope that they fully understand that they haven't changed sex - if they don't understand this, they have not had neutral support - and that they follow the law on single-sex sports, services and spaces.

That doesn't follow, there doesn't have to just be one explanation for a piece of evidence for it to be regarded as evidence. There are almost always multiple possible explanations for the same thing. In scientific medical terms, this is usually thought of in the terms of 'this piece of evidence is consistent with the hypothesis that..." rather than saying its the only possible hypothesis.

That’s not quite right. The Dutch protocol wasn’t simply about helping adults “pass.” It was explicitly designed for adolescents experiencing severe gender dysphoria, with puberty suppression intended both to alleviate distress associated with developing unwanted secondary sex characteristics and to facilitate any later transition in carefully selected cases. Those two rationales weren’t mutually exclusive

The way to lower that risk may well be to help a child come to terms with their developing body where possible. But what if that doesn’t work?

What if the child says, “I’ve tried. I understand everything you’re telling me. I know my body is functioning normally, but none of that reduces my suffering. I can intellectually accept what’s happening, but emotionally I’m still in profound distress.”

What then?

At that point, simply repeating “you need to accept your body” isn’t a treatment—it’s just restating the goal. The real clinical question is what should be done when acceptance-based approaches fail. If someone believes no medical intervention is ever justified, they need to explain what they think should happen to those patients whose suffering persists despite genuine attempts at psychological support and acceptance

No, PBs came out of the Dutch protocol as a suggested method that adult men might pass better. Nothing whatsoever to do with childhood distress.

Yes for some young people with persistent gender dysphoria, undergoing endogenous puberty may itself carry a risk of significant psychological harm- and those harms may be long term as many of the effects of puberty are irreversible. That isn’t a claim invented in 2026—it’s one of the central reasons puberty blockers were proposed in the first place.

simply dismissing the possibility that endogenous puberty can be profoundly distressing for some adolescents as “TRA gubbins” doesn't really contribute to a meaningful debate.

If your position is that every child should undergo endogenous puberty regardless of how severe or persistent their distress is, then explain why you think the harms of that approach are outweighed by the risks

What if a child's parent dies and they are understandably distressed? You can't bring the parent back to life. The child has to sadly deal with reality. You work through it with understanding, but you don't pretend the parent hasn't died.

A child changing sex is as impossible as bringing someone back to life.

Trying to bend reality to stop children feeling distressed about reality is absurd.

weigh the potential harm of being required to undergo the irreversible changes of natal puberty—, which for some, may result in profound and long-lasting psychological suffering—

No. This is ridiculous. You have no basis for this claim.

Suddenly, in 2026, we need to prevent puberty in children because it 'may result in profound and long-standing psychological suffering'?

This is absolute nonsense. Complete TRA gubbins.

The way to lower that risk may well be to help a child come to terms with their developing body where possible. But what if that doesn’t work?

What if the child says, “I’ve tried. I understand everything you’re telling me. I know my body is functioning normally, but none of that reduces my suffering. I can intellectually accept what’s happening, but emotionally I’m still in profound distress.”

What then?

At that point, simply repeating “you need to accept your body” isn’t a treatment—it’s just restating the goal. The real clinical question is what should be done when acceptance-based approaches fail. If someone believes no medical intervention is ever justified, they need to explain what they think should happen to those patients whose suffering persists despite genuine attempts at psychological support and acceptance

This shouldn’t surprise anyone. I don’t think anyone would argue that medical interventions—whether surgery or hormonal treatment—always produce outcomes that are preferable to allowing natural physiological processes to occur. The real question is not whether intervention has disadvantages, but how those disadvantages compare with the consequences of not intervening. Clinical decisions are made by weighing the likely overall benefits and harms of each option in the context of the individual patient’s condition.

In the case of CAIS, for example, clinicians balance the risk of cancer against the benefits of retaining the testes to produce natural hormones for as long as appropriate.
Similarly, for children with gender dysphoria, the question is how to weigh the potential harm of being required to undergo the irreversible changes of natal puberty—which, for some, may result in profound and long-lasting psychological suffering—against the risks and harms of medical intervention, such as infertility and other potential long-term consequences. The ethical question is about balancing competing risks, not comparing a risky intervention with a risk-free alternative.

meant to quote @AimsAndObjectives post above

Similarly, for children with gender dysphoria, the question is how to weigh the potential harm of being required to undergo the irreversible changes of natal puberty—which, for some, may result in profound and long-lasting psychological suffering—against the risks and harms of medical intervention, such as infertility and other potential long-term consequences. The ethical question is about balancing competing risks, not comparing a risky intervention with a risk-free alternative.

The word "natal" when describing puberty is superfluous and gives the misleading impression that an alternative puberty is available instead. Additionally, there is no potential harm associated with going through puberty. It's a natural process and doesn't bring harm to anyone going through it.

However, I agree that it's not risk-free if a child suffers profound and long-lasting psychological suffering when going through puberty. The way to lower that risk is to carefully help the child to accept that their body is doing what it's designed to do.

The way to make that suffering and risk worse is to let the child believe that the only thing that will keep them safe is transition, and that anyone who challenges that view is harmful to them. That's where the potential for harm comes in.

Edited for clarity

There is nothing inherently more "experimental" about intervening than not intervening when a child has a medical condition causing significant distress. Choosing not to provide a particular treatment is still a clinical decision with consequences, not a neutral default. If the natural course of the condition is uncertain, or if delaying treatment may itself alter long-term outcomes, then both action and inaction involve uncertainty and risk.
The important question is for this child , in this circumstance, and given the available evidence which is the best balance of benefits versus harms.