what is the average age a girl start their period
The average age is 12, but this does not mean that all girls start at the same age. A girl can start her period anytime between the ages of eight and 15. Usually, the first period starts about two years after breasts first start to grow. If a girl has not had her first period by age 15, or if it has been more than two to three years since breast growth started, she should see a doctor.
now the average age for a first period is closer to 12 with one university of cincinnati study reporting that about 10 to 15 percent of girls enter puberty at age 7 or younger a phenomenon known as precocious pubertyhey were even more puzzled she recalled when she began menstruating shortly before she turned 7 puberty comes earlier the average of age of puberty has been getting steadily lower since the early 20th century when girls had their first period at age 16 or 17 according to the american academy of pediatrics