The growth of pubic hair is not a sign of maturity, but represents the beginning of pubertal development. The general sequence of pubertal development in girls is breast development, changes in pubic hair and external genitalia, menstruation, and growth of armpit hair, etc., and the whole process takes about 1.5 to 6 years. Boys pubertal development in the general order of testicular volume increase, followed by penis growth and thickening, the emergence of pubic hair, armpit hair growth, low voice, beard growth and other characteristics, the whole process takes about 5 years. Therefore, the growth of pubic hair does not represent developmental maturity, but is only a manifestation of secondary sexual characteristics after entering pubertal development. The final developmental maturity is at the end of pubertal development, the secondary sexual characteristics to reach the adult type, the development process does not have the standard of maturity.