Stuttering is not genetic. Your daughter may have developed a subconscious fear of speaking. My sister-in-law had the same problem, but after a few months, it was gone. Now, she speaks well and is 6 years old. You can teach your daughter some skills to help her: 1. Meditation 2. Quality sleep (sleep from 9 to 10 pm and wake up before 7 am) 3. Always keep her happy and smiling 4. Teach her to be grateful for everything she has 5. Practice Anulom Vilom Pranayama 6. Always make her comfortable and don't pressure her You will see the magic in few days