1, whether menstruation is reported in advance: At present, the menarche of girls is generally around 1 1 years old, but if menstruation occurs early before the age of 8 ~ 9, it can be judged as precocious.

2, breast bulge: pay attention to the difference between children's obesity, some fat children are already fleshy and loose on the chest, and parents mistakenly think that it is early breast development. In fact, it doesn't count as long as the chest doesn't touch the induration.

3. Early testicular development: Generally, the size of a boy's testicle before 1 1 is similar to that of a quail egg. If it is as big as pigeon eggs or a small egg, parents should pay attention.

4, the height is too prominent: if the child's head is particularly prominent among children of the same age, even half a head to one head higher than the average child of the same age, parents should not think that it is too proud to develop well. Because this may also be a sign of the child's early sexual development, it is best to take the child to the hospital for bone age screening as soon as possible.

5. Early growth peak: If girls suddenly show signs of "crazy growth" before the age of 9 and boys before the age of 1 1, for example, the growth rate of height within six months to one year is much higher than the average annual growth rate, which means that the growth peak of children comes early, which is also one of the manifestations of precocious puberty.