I asked what causes it. There are two things: the cartilage at the top of the trachea is not fully formed and the chords aren't stretching, or they'll have long term damage and if they don't grow with her, she will loose her voice eventually....
It is heart breaking. She needs a follow-up scope in July to determine what is going on. My only one that can have normal everyday conversation might not be able to speak at all. Just a little Ironic.