Stuttering is a neurodevelopmental difference in the way that some people's brains process speech, it's not really something that can be cured. The STAMMA website has a regular research arena that people can get involved with to hear what's happening, and volunteer to take part in research. https://stamma.org/get-involved/events/research-arena-august A talk about the role of genetics: https://stamma.org/get-involved/events/research-talk-genetics-stammering This is all UK based by the way