Figure 1.

Puberty hormone change and tempo. Shows the pattern of testosterone and oestradiol change during puberty, the puberty milestones of menarche and Spermarche in relation to puberty stage and how the tempo of puberty may vary between individuals.

Steinbeck et al. BMC Pediatrics 2012 12:143   doi:10.1186/1471-2431-12-143
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