Overview Androgen Effect on Klinefelter Syndrome Motor Outcome Status: Completed Trial end date: 2017-11-30 Target enrollment: Participant gender: Summary The purpose of this study is to evaluate the effects of low-dose androgen on the motor and cognitive development of boys with Klinefelter syndrome. Phase: Phase 2 Details Lead Sponsor: Thomas Jefferson UniversityCollaborator: National Institute of Neurological Disorders and Stroke (NINDS)Treatments: AndrogensAscorbic AcidEstrogens, Conjugated (USP)MethyltestosteroneOxandrolone