Stuttering often resolves spontaneously before adolescence, leading to a population prevalence of 1%–2% among adults. Stuttering beyond childhood is characterized by a significant bias toward males, with males outnumbering females by a ratio of 3:1–5:1 (Yairi et al. 1996). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1288304/