Is testosterone important in the development of the human body

Is testosterone important in the development of the human body?
Testosterone plays vital roles in the development of the human body from conception on. Seventy days into fetal life, testes enlarge and undergo a short period of activity. During this time period, testosterone is synthesized from a number of precursors and can be measuredin fetal plasma (77). The testes are active throughout the first year of life and then testosterone concentrations decline until puberty. Concentrations of testosterone rise again at the onset of puberty, with increases becoming evident during sleep. These increases are associated with secretory bursts of leutinizing hormone.