Usually it is considered normal for girls in China to menstruate at the age of 12 to 16 years old, and the exact time varies from person to person, and is related to heredity, living habits and other factors.
Normally, it is normal for girls in China to menstruate at the age of 12 to 16. The first menstruation for girls is called menarche, which is one of the important signs of puberty.
However, there are obvious individual differences in when adolescent girls start menstruating, mainly related to genetics, living habits, diet and other factors. If a girl is over 16 years old and her secondary sexual characteristics have developed, but she has not yet had her period, it is necessary to suspect that it is caused by a disease.
When girls start to menstruate, parents need to strengthen the knowledge of puberty physiology and sexual psychology. If she does not have her period for a long time, she needs to go to the hospital in time.