Reasonably accurate predictions can be made based on the location and size of your curve(s), your age, and your skeletal maturity. There also are new genetic tests that may be used to answer this question. If a curve develops at a young age or before a girl begins her period, there is a greater chance the curve will get worse. On the other hand, the more mature your skeletal system is, the less likely your curve will continue to grow. Mostly, we like to keep an eye on the curve over time to see if it gets worse or not.