How do I know my growth plates have fused? Understanding bone maturity
Growth plates, or epiphyseal plates, typically harden and close by the end of puberty, around ages 14–16 for girls and 16–18 for boys. To definitively answer the question, "How do I know my growth plates have fused?" requires a medical evaluation, most commonly involving an X-ray. This scan provides the clearest evidence of whether the cartilage has fully ossified into bone, signaling the end of longitudinal growth.