![An external file that holds a picture, illustration, etc., usually as some form of binary object. The name of referred object is rmmj-2-3-e0057_Figure3.jpg](images\rmmj-2-3-e0057_Figure3.jpg)
Figure 3.
Changing sex hormone levels during the first 20 years of human life-history. Life-history stages of boys and girls (upper panel) may be defined by sex hormone levels (lower panel). Note the rise in sex hormones in early infancy – the so-called “mini-puberty”. Childhood is characterized by quiescence of sex hormones, followed by a juvenile increase of adrenal androgens and adolescent increase in gonadotropin and gonadal sex hormones, manifesting as puberty.