J.B.
My son did the same thing! He has a twin sister & she did not do this. I was concerned also as he was a great communicator also. If you Google, toddler & stuttering, you'll find out that at this age, a lot of kids do this. NO need for alarm, it will only last a week up to a month or so. My son did it out of the blue for about 2 weeks & then nothing since. Do as the speech pathologist said below........don't finish her sentences as she will get frustrated. Just let her talk & try to ignore what's going on as it's just a phase.