Is it normal for a 10-year-old girl to have her period?

10-year-old girls to menstruation is also a normal phenomenon, under normal circumstances, women's menstrual cramps is between 11-14 years old, menarche time and a variety of factors, such as region, genetics, race, hormone levels, eating habits, etc., some girls menarche time may be relatively early, at the age of 10, as long as not earlier than 9 years old, also within the normal range. 10-year-old girl menstruation is due to ovarian maturity, able to secrete estrogen and progesterone, will cause menarche arrival, but because the hypothalamus-pituitary-ovarian gonad axis has not been fully established, will show irregular menstruation phenomenon, do not worry too much, often with the growth of age, ovarian function gradually sound, menstruation will become regular to follow.