RecruitingPhase 3Genetic interventionSafety and Preliminary Efficacy of TSHA-102 Gene Therapy in Pediatric Females Aged >2 to <4 Years With Rett SyndromeThe primary objectives of this study are to evaluate the safety, tolerability and preliminary efficacy of a single intrathecal (IT) dose of TSHA-102 in pediatric females with typical Rett syndrome.