What Are the Common Signs of Early Puberty in Children?

What are the common signs of early puberty in children? How should parents correctly view and guide this situation? My daughter has recently started showing disinterest in young boys and has started keeping a diary. Is this a sign of early puberty and adolescence? What treatments has she undergone, and what were the results? As a parent, what kind of support should I provide? What aspects should I pay special attention to in educational guidance?
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