10 Oldest Surviving Documents Of Their Type. Writing things down is one of the most important innovations in human history. As well as being able to spread ideas accurately across distance and time, writing also provided the records needed for law to function.
In the United States, the average age for a girl to get her first period is 12. This does not mean that all girls start at the same age. A girl can start her period anytime between the ages of 8 and 15. Most of the time, the first period starts about 2 years after breasts first start to develop. If a girl has not had her first period by age 15, or if it has been more than 2 to 3 years since breast growth started, she should see a doctor.
yes not only girls go through puberty speaking of girls and their hormones there is such thing as getting a period girls start their period when they are 10 or maybe sometimes start when they are in their teen years periods last 5 7 days a monthhe age of menarche her first period is about 2 years after the first signs of puberty girls are all different some hit puberty at a young age of 8 whereas some hit puberty at 15