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Fat or breast? new study aims to solve puberty puzzle in overweight girls

NCT ID NCT02583646

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Sep 16, 2026 · Updated 9 times

Summary

This study looks at whether overweight girls start puberty earlier than girls of normal weight. Researchers will use breast ultrasound and other tests to tell the difference between breast tissue and fatty tissue. The study involves 150 healthy girls ages 8-14 who have some breast development but have not started their period. Participants will have physical exams, ultrasounds, blood and urine tests, and X-rays to measure body fat and bone maturity.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

93 people

The number who actually took part.

Started

Dec 2015

Expected to finish

Sep 2026

An estimate. End dates often move.

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

community sample

Ages

8 to 14 years

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

* INCLUSION CRITERIA: * Girls without a chronic medical condition * Normal weight (BMI 5th-85th%) or overweight/obese (BMI \> 85th%) * 8-14 years old * Some breast development * Pre-menarchal EXCLUSION CRITERIA: * Treated with medications that may affect reproductive hormones (e.g. birth control pills). * Pregnancy During the study, the PI s discretion may be used to determine final eligibility. The PI s discretion may be used at any point in the study (pre-screening, clinical/lab assessments, etc.) to ensure participants are not subjected to unnecessary procedures or visits.

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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

Locations

  • NIEHS, Research Triangle Park

    Research Triangle Park, North Carolina, 27709, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.