A girl will experience much growth beginning at age nine, with the peak growth occurring at around age 12. Growth in girls pretty well stops at age 14 to 15. The average age of thelarche is 9.8 years, and the full adult-shaped breast may take up to five years to develop. In around 1 out of 5 girls this step may happen before the development of breast budding. Full adult pubic hair will be in place by an average age of 14.
Menarche occurs after the peak growth phase has passed.
Slower growth, usually adding up to no more than 2.4 inches, will happen after the onset of menses. So girls that are short when the begin their periods will grow very little afterwards. Once a girl begins having menstrual flow, all is not completed. The maturation of the whole system that controls reproduction has not been completed. It is common for a girl to have menstrual flow for nearly two years before she actually starts producing eggs in her ovaries.