Puberty blockers and bones: new study explores risks for transgender teens
NCT ID NCT04203381
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looked at bone health in transgender youth aged 9-14 who were starting puberty blockers (GnRH agonists). Researchers used MRI and other scans to measure bone marrow and density changes over 24 months, comparing them to healthy peers. The goal was to understand if blocking puberty affects bone development. The study was terminated early, so findings are limited.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
GnRH agonist (puberty blocker)
What this could lead to
If successful, this could help doctors understand how puberty blockers affect bone development in transgender youth, guiding safer treatment.
What could go wrong
This was a small, terminated observational study with only 78 participants, so results may be limited and not apply to all youth.
Disclaimer
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This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Boston Children's Hospital
Boston, Massachusetts, 02215, United States
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Cincinnati Children's Hospital Medical Center
Cincinnati, Ohio, 45229, United States