Precocious puberty means that boys show secondary sexual characteristics before the age of 9 and girls show secondary sexual characteristics before the age of 8. According to the pathogenesis and clinical manifestations, it can be divided into central (gonadotropin-releasing hormone-dependent) precocious puberty and peripheral (gonadotropin-releasing hormone-independent) precocious puberty, which used to be called true precocious puberty and false precocious puberty respectively.
Extended data:
Central precocious puberty (CPP) has a procedural process similar to the initiation and maturation of hypothalamus-pituitary-gonad axis (HPGA) in normal youth development until the reproductive system matures. That is to say, gonadotropin releasing hormone (GnRH) is secreted and released from hypothalamus in advance, which activates pituitary gland to secrete gonadotropin to make gonad develop and secrete sex hormones, so that internal and external genitalia develop and secondary sexual characteristics appear.
Peripheral precocious puberty is caused by various reasons that sex steroid hormones in the body rise to puberty level, so there is only the early appearance of secondary sexual characteristics, and there is no complete programmed process of sexual development.
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