what age do girls get periods
And as they enter puberty, girls should get preventive checkups to learn about their reproductive health in a confidential setting, the doctors add. Girls are 12-13 years old, on average, when they get their first menstrual period (menarche), the committees note. That average age hasn't changed much in 30 years, though black girls go through menarche five months earlier than they did 30 years ago, according to the committees.