Physical development in adolescence includes changes that occur through a process called puberty. During puberty, your child’s brain releases certain hormones. The hormones cause your child’s body to physically change and their sexual organs to mature. Your child will likely experience a growth spurt. During this time, they’ll grow rapidly in height and weight. Other physical changes may include body odor, acne and an increase in body hair. Growth spurts usually happen earlier for girls and adolescents assigned female at birth (AFAB) than for boys and adolescents assigned male at birth (AMAB). Most girls and adolescents AFAB have growth spurts between the ages of 10 and 14. Most boys and adolescents AMAB have growth spurts between the ages of 14 and 17. Girls and adolescents AFAB will begin to develop breasts. This can happen as young as age 10 and should start by age 14. They’ll also experience their first period (menstruation) — usually about two years after breasts and pubic hair are first noticeable. Boys and adolescents AMAB will see their penis and testicles grow. They’ll begin to experience erections and ejaculations. (Erections can also happen normally from before birth — as seen on ultrasound in utero — to old age.) These physical changes happen to everyone, but the timing and order can vary from person to person. Some adolescents mature early, while others mature later. Being on either end of this spectrum can cause the added stress of standing out amongst their peers. If puberty is happening early (before age 8 for girls and adolescents AFAB and before age 9 for boys and adolescents AMAB) or late (after age 14 for girls and adolescents AFAB and after age 15 for boys and adolescents AMAB), see your pediatrician or an adolescent medicine doctor. They can help manage and treat this problem of puberty. Ignoring these problems can have an impact on bone development and growth.