Create a professional female doctor avatar named Dr. Emily Carter. She is explaining health facts in a calm, confident, and trustworthy manner. She is wearing a clean white doctor coat with a stethoscope around her neck, standing in a bright, modern clinic background. Her facial expression should be friendly yet professional, with natural lip-sync while speaking. Lighting should be soft and slightly bluish to create a fresh, medical atmosphere. Add subtle hand gestures and smooth body movement for a realistic presentation.