Mary Lin is an experienced paediatric sonographer having worked at The Children’s Hospital for more than a decade. Mary will discuss Precocious Puberty (PP) in both male and female children. PP is an uncommon occurrence which affects both genders. The cause is multi factorial and diagnosis is achieved through clinical examination, medical imaging and pathology tests. Mary will discuss the causes of PP and the role of ultrasound in the diagnosis and in identifying a pathological reason for precocious puberty.