Clinical trial Recruiting at 1 site Observational Ages 5 to 19

Investigating puberty onset in Danish children

Official title: The COPENHAGEN School Study. Normal Pubertal Development in Youth 2021 and Long-term Disease and Death Risk After Extremely Early Puberty

Run by Copenhagen University Hospital, Rigshospitalet · NCT04884620 · Data updated 2026-11-12

This study looks at healthy Danish school children to see if they are starting puberty earlier than they did 15 years ago and what that might mean for their long-term health.

Quick facts

Study typeObservational
Ages5 Years to 19 Years
SexAll
Enrollment3000 (estimated)
SponsorCopenhagen University Hospital, Rigshospitalet
Academic / other
Drugs / interventionschemotherapy, radiation
Locations1 site (Copenhagen)
StatusRecruiting
StartedJanuary 1, 2023
Main results expectedDecember 31, 2026
Study endsDecember 31, 2056
Registry record updatedJanuary 10, 2024
Trial IDNCT04884620 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are healthy children and adolescents of Caucasian descent.

Probably not a fit

Patients with acute diseases, cancer, or chronic conditions will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study examines healthy Danish school children to determine if the age of pubertal onset has continued to decline over the past 15 years. It involves clinical examinations and blood sample withdrawals to assess various physical development markers and hormone levels. The study aims to explore the mechanisms behind earlier puberty onset and the long-term health risks associated with extremely early puberty using data from Danish registries.

Why it matters

Potential benefit: If successful, this study could provide insights into the health implications of early puberty and inform public health strategies.

How similar studies have gone: Other studies have shown varying results regarding the trends in puberty onset, but this specific approach is novel in its comprehensive assessment of both physical and hormonal factors.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Healthy children and adolescents

Exclusion Criteria:

* In case of acute disease, cancer, cancer therapy, or chronic disease (History of malignant disease, chemotherapy or radiation, cystic fibrosis, juvenile rheumatoid arthritis, systemic lupus erythematosus, sickle cell disease, thalassemia, chronic renal disease or known numerical chromosome aberration)
* Non-Caucasian

Where it's running

  • Rigshospitalet, Department of Growth and Reproduction
    Copenhagen, Denmark
    Recruiting

Study contacts

  • Principal investigator: Anders Juul, PhD, DMSc — Rigshospitalet, Department of Growth and Reproduction
  • Study coordinator: Anders Juul, PhD, DMSc
  • Email: anders.juul@regionh.dk
  • Phone: +45 35 45 13 77

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.