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New study aims to unlock mysteries of sex chromosome disorders in children

NCT ID NCT07341412

Knowledge-focused Sponsor: University of Aarhus Source: ClinicalTrials.gov ↗

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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This study follows 300 fetuses and children with sex chromosome disorders to track their growth, organ development, and overall health. Researchers will also look at genetic and gut microbiome factors. The goal is to better understand how these conditions affect children over time, without offering a direct treatment.

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

About 300 people

The number the study aims to enrol. It can still change while the study runs.

Started

Sep 2024

Expected to finish

Jan 2034

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Who is studied

Recruitment of cases will take place at obstetric departments, departments of clinical genetics, and pediatric departments throughout Denmark. Recruitment of controls will take place at the Department of Gynecology and Obstetrics and Department of Pediatrics, Aarhus University Hospital as well as via Facebook groups.

Ages

0 to 50 years

Sex

Anyone

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 for pregnant participants in case group: Age ≥18 years Fetus with a genetically verified sex chromosome disorder Written informed consent Inclusion Criteria for pregnant participants in control group: Age ≥18 years Normal first- and second-trimester ultrasound examinations Fetal growth within the normal range Written informed consent Inclusion Criteria for mothers in the case group: Age ≥18 years at the time of pregnancy with the child Child with a genetically verified sex chromosome disorder Written informed consent Inclusion Criteria for mothers in the control group: Age ≥18 years at the time of pregnancy with the child Normal first- and second-trimester ultrasound examinations during the pregnancy Normal fetal growth during the pregnancy Written informed consent Inclusion Criteria for children in the case group: If parents share joint custody, written informed consent must be obtained from both parents Ability to undergo a physical examination Child with a genetically verified sex chromosome disorder (prenatally or postnatally diagnosed) Inclusion Criteria for children in the control group: If parents share joint custody, written informed consent must be obtained from both parents Ability to undergo a physical examination Exclusion Criteria for all groups: Severe claustrophobia Implanted magnetic material contraindicating MRI

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Conditions

The condition(s) this trial relates to.

gonosome anomaly Klinefelter syndrome Sex Chromosome Disorders trisomy X Turner syndrome XYY Karyotype

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Sex chromosome disorders

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Aarhus University Hospital

    Aarhus, 8200, Denmark

More trials for these conditions

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