Puberty starts at about 11 or l2 years of age for girls and around 13 years for boys. This is a phase of development, in which the body and the mind undergo a change. Growth spurts, the production of sex hormones start, girls experience their first menstruation, and boys experience the breaking of their voices. Boys and girls start discovering their own sexuality and emotions run high. The transition from childhood to the adult phase is a special time and has different meanings in different cultures.
