At about week 7 in utero, the intercourse-related gene over the Y chromosome initiates the development of your testicles in male infants. The testicles make testosterone.
[86] Married men who engage in bond-servicing routines for example expending the working day with their spouse or baby have no unique testosterone ranges when compared to occasions when they do not engage in these activities. Collectively, these final results advise the existence of aggressive functions rather then bond-routine maintenance routines is much more appropriate to improvements in testosterone degrees.[87]
男性的第二性征包括雄激素性毛发、声音变粗、喉结出现、肩膀变宽、肌肉增加和阴茎生长。
精囊 · 精腺排泄管 · 摄护腺（尿道嵴／精阜／摄护腺小囊／射精管 · 摄护腺窦／摄护腺小管） · 尿道球腺
It’s unlikely — and tricky to explain to — that an adult assigned male at delivery has increased-than-regular amounts of testosterone.
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It's been theorized that Mind masculinization is going on because no important changes have already been determined in other areas of your body.[27] The male Mind is masculinized because of the aromatization of testosterone into estradiol,[28] which crosses the blood–Mind barrier and enters the male Mind, Whilst female fetuses have α-fetoprotein, which binds the estrogen so that female brains usually are not impacted.[29]
在发育中的睾丸里的性索中，来自中胚层的上皮细胞成为塞尔托利氏细胞，辅助精子的形成。
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Testosterone might also simply exaggerate or amplify current aggression; for instance, chimpanzees who receive testosterone boosts grow to be extra aggressive to chimps lower than them while in the social hierarchy, but will nonetheless be submissive to chimps higher than them. Testosterone Therefore doesn't make the chimpanzee indiscriminately aggressive, but as a substitute amplifies his pre-existing aggression toward decreased-ranked chimps.[129]
睪酮芳構化成雌二醇會對腦及骨這兩個人體重要的組織構成主要的影響。在骨中，雌二醇加速了軟骨成長為骨的過程，使骨端接合及完成生長的程序。在中樞神經中，雌二醇是給予下視丘的主要迴饋訊號，尤其在影響排卵素的分泌。在很多哺乳動物的腦部中，某些性別差異區域在出生前或產期的雄性化，都是受著睪酮所產生的雌二醇影響，決定將來的雄性性行為。
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Slipping in enjoy has become joined with decreases in Males's testosterone levels when blended improvements are described for Females's testosterone ranges.[eighty one][82] There has been speculation that these changes in testosterone end in the short term reduction of variances in actions concerning the sexes.
Testosterone is incorporated on the earth Well being Business's list of crucial medicines, that happen to be The main remedies essential inside of a fundamental overall health procedure.