This chapter provides detail description of sonography in pediatric gynecology. Chapter has 59 well illustrated diagrams and pictures. Ultrasound examination of children, anatomical difference between adult and child, measurements of uterus and ovary, transperineal sonography, ovarian new growth, malignant tumors, infections and other conditions, congenital anomalies of genital tract, ultrasound of breast in children, common breast diseases are described in detail with the help of excellent illustrations and histological pictures. One table is included to highlight measurements of uterus and ovaries on sonography in children. Bibliography has 12 references at the end of the chapter for further reading.