when do girls get their periods

Girls typically get their first period, known as menarche, between the ages of 10 and 15, with the average age being around 12 years old. It generally occurs about 2 to 2.5 years after breast development begins. Some girls may start as early as age 8 or as late as age 16, and this timing can be influenced by genetics and environmental factors. The period may be irregular at first but usually becomes more regular after a few years. Signs that a period is approaching include breast development, pubic hair growth, and vaginal discharge a few months before the first menstruation.