Scoliosis most often develops in late childhood because of the association between growth and progressive scoliosis curves. Although scoliosis can develop at any age, including infantile (age birth- 3), Juvenile (age 3-10), adolescent (age 10-18) and adult (> age 18), the most common time to detect curves are in late childhood/early teen years. Thus, the most common form seen, Adolescent Idiopathic Scoliosis (AIS), is detected between ages 10 and 18, often just before or after puberty and the associated adolescent growth spurt. Small curves (10-20 degrees) are nearly equally found in boys and girls, but larger curves which often need treatment (those > 40 degrees) are seen in females to males in a 9:1 ratio. It is a bit unclear why that is the case, it may certainly be a genetic tendency, and/or something relating to hormonal alterations or connective tissue adaptations for the potential for childbirth in females.