<unk>  is the condition when the secondary sex characteristics happen earlier than normal. In boys the body chanes begin prior 9 years old, in girls prior 6~8 years old. It may be caused by many diseases, such as congenital adrenal hyperplasia, disorders of the testicles, ovaries, or adrenal glands, hypothalamic hamartoma, McCune-Albright syndrome and 
tumors. Hormone tests and imaging technology can help the doctor diagnose the disease. Treatment and prognosis of<unk>  depend on the cause. Psychosocial support for these children is necessary and important.
Precocious puberty
Delayed puberty
Pubertal delay
Hypogonadism
Hyperprolactinemia
Hirsutism
Infertility
Hyerthyroidism