← Eichor
Study identifier: NCT03396562 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

The eXtroardinarY Babies Study: Natural History of Health and Neurodevelopment in Infants and Young Children With Sex Chromosome Trisomy

Condition: Klinefelter Syndrome · Trisomy X · XYY Syndrome  ·  Sponsor: University of Colorado, Denver

PhaseN/A
Planned participants300
Who can joinAll sexes, 6 Weeks to 13 Months
Healthy volunteersNo

About this study

This study is designed to research the natural history of neurodevelopment, health and early hormonal function in infants with XXY/Klinefelter syndrome, XYY, XXX and other sex chromosome variations in an effort to identify early predictors of developmental and health outcomes. The Investigators will also evaluate different developmental screening tools in infants with sex chromosome variations so the investigators can develop recommendations for pediatrician caring for infants and young children with XXY/Klinefelter syndrome, XYY, XXX, and other sex chromosome variations.

This description comes directly from the study's public registry record.

Talk to the study team

Nicole Tartaglia, MD, MS  ·  (720) 777-8087  ·  nicole.tartaglia@childrenscolorado.org

Susan Howell, MS, CGC, MBA  ·  720-777-8361  ·  susan.howell@childrenscolorado.org

Always discuss trial participation with your own doctor first.

Locations (2)

Children's Hospital ColoradoAurora, Colorado, United StatesRecruiting
Nemours at Thomas Jefferson UniversityPhiladelphia, Pennsylvania, United StatesRecruiting

Follow this study

Get one email when the public record changes — results posted, or the study's status changes. Nothing else, ever.

We email about this public record only. Unsubscribe anytime with one click. Never medical advice.

Is this your study? This page was generated automatically from the public registry record. Sponsors can claim it — free — to add branding and verified contact routing. Claim this page →

This page is independently generated by Eichor from the public ClinicalTrials.gov record and re-synced daily. It is not the sponsor's official website unless claimed. Nothing here is medical advice; eligibility is always determined by the study team — talk to your own doctor first.

Source record: clinicaltrials.gov/study/NCT03396562