How old do girls usually learn to be from China?

13 to 50 years old. According to the statistics of the World Health Organization, children born to women aged 30 to 35 are the healthiest. Lagerstroemia development girl/Kloc-people over 0/3 years old, with normal height and weight development and no irregular menstruation, so Lagerstroemia development is normal. Lagerstroemia indica is a part of female endocrine and reproductive system, also known as gonad or ovary.