eXtraOrdinary Babies Study

The eXtraordinarY Babies Study is ongoing, but enrollment has now ended. The 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 to identify early predictors of developmental and health outcomes. We will also evaluate different developmental screening tools in infants with sex chromosome variations so we can develop recommendations for pediatrician caring for infants and young children with sex chromosome variations. Participants come into our clinic about annually for multiple years and complete developmental assessments, physical exams, blood draws, body composition scans, and other surveys. This was approved by COMIRB #17-0118 and is funded by NIH/NICHD.