RecruitingPhase 3Drug trialTo Investigate the Efficacy of Treatment With Oral NA-921 (Bionetide) Versus Placebo in Females With Rett SyndromePrimary Objective • To investigate the efficacy of treatment with oral Bionetide versus placebo in girls and women with Rett syndrome Key Secondary Objective • To investigate the efficacy of treatment with oral Bionetide versus placebo on ability to communicate in girls and women with Rett syndrome