- 47,XXY / Klinefelter syndrome
- Less than 3 months of age
- COMIRB number
Purpose of the study
This research study will learn more about the effects of testosterone shots on body fat and development in infants with XXY/Klinefelter syndrome.
This study is 6 months long and includes three in-person visits at the Children's Hospital Colorado. At the visits your baby will have a:
- Developmental evaluation
- Body fat measurement in a special scale
- Blood draw, urine and stool collection
- Physical examination
All infants in the study will receive testosterone shots.