My father, uncle and 2 brothers stuttered. But somehow all of them grew out of it around the age of 14-16. I never heard my father stutter but everyone says that it was pretty bad. My younger brother also stuttered but he's around 16 now and almost completely normal. I'm happy for him and kinda jealous too tbh. I however am 22, close to 23 and stutter is so bad that i haven't ordered on phone in my whole life. Have to take my younger brother with me to the market, And stopped talking on phone altogether.