I really like what you said that she could be the very good at helping the child's self-esteem, because I agree very much. It feels weird to say it, but sometimes I almost hope to get a child who stutters, because I feel like I'd be the perfect person to deal with it. I'm 22 so it will take a long time for me until I'll think about having children, but when I do I wanna be very comforting and understanding about it. As a kid I could get really frustrated about it and by now I have totally accepted it and I even kinda like it in a way. To be honest I can't really comprehend thinking about not getting children because of stuttering, because I think it'd be pretty awesome to have your own little stuttering friend haha, I'm sure it will give you an extra strong connection to your child. I really hope your fiance will think about it differently. I think it's important for parents to deal with having a child who stutters correctly. My parents were great in that way, but sometimes my mother could get irritated when my stutter (or more specifically, my speech) was relatively severe and she felt that I wasn't putting in enough effort while talking. I'm definitely not the type of person to become angry easily, but I would always get angry when she acted like that - although I now kind of understand what she meant. If you haven't already, I recommend watching The King's Speech. Someone in this subreddit once said that he/she loved how the movie so accurately portrays the comforting role of the king's wife. I have a girlfriend myself (now for more than 3 years) and she's always said she really likes my stutter, and she would love to go to speech therapy with me (if I ever go again, but as a kid I went a LOT). Finally, to answer your question: normally the chance for someone to stutter is 5%, and if one of the parents is a stutterer then it's 25%. 5% is obviously high as you don't seem to encounter that many stutterers every day; this number includes the many children/teens who stutter at first but then lose it when they get older. Edit: I'm now reading some rather extreme comments in this thread, which probably has all to do with the extent to which someone stutters. I'm guessing your fiance's stutter is relatively severe (as a kid mine used to be as well, nowadays it really fluctuates over weeks/months/years), so I really shouldn't judge for thinking about it differently. Still, it doesn't mean at all that the child's stutter (if he/she stutters at all) will be as severe as hers.