At all around week 7 in utero, the intercourse-associated gene to the Y chromosome initiates the development with the testicles in male infants. The testicles produce testosterone.

The 1st time period takes place involving 4 and 6 weeks with the gestation. Examples include genital virilisation such as midline fusion, phallic urethra, scrotal thinning and rugation, and phallic enlargement; Even though the position of testosterone is way smaller sized than that of dihydrotestosterone. There exists also improvement of your prostate gland and seminal vesicles.[citation essential]

維持性慾及勃起次數（濫用補充劑可能會導致疼痛性陰莖異常勃起、和性慾亢進）

睾酮是经由血液中的性激素结合球蛋白运送至身体的目标组织。男性生殖腺内的塞尔托利氏细胞需要睾酮来生成精子。

放射免疫测定法：睾酮主要产生于睾丸小叶曲精管之间的间质细胞，此外肾上腺皮质也能合成。当标本中加入H睾酮和睾酮抗体即产生竞争抑制作用，在反应系统中，当H睾酮和其抗体量保持恒定，则标记抗体复合物的形成量受未标记抗原量所制约，用葡聚糖加膜活性炭进行分离，使结合标记抗原与游离标记抗原分开，测定沉淀的结合部分，进行液闪仪计数（dpm）与标准相比，求出未知样品的含量。

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Classical male hypogonadism is when lower testosterone levels are as a consequence of an fundamental clinical ailment or damage to your testicles, pituitary gland or hypothalamus. For example, anyone could be born with a situation (congenital) that leads to small testosterone, which include Klinefelter syndrome or Kallmann syndrome, or they might establish it afterwards (obtained), for instance from an something which adjustments the traditional functioning of their testicles, hypothalamus or pituitary gland.

LH then travels towards your gonads and stimulates the generation and launch of testosterone. (LH a lot more normally stimulates the manufacture of estrogen and progesterone in ovaries.)

Full testosterone blood check (this is usually executed in the morning due to the fact testosterone ranges are best then).

Pubertal results begin to manifest when androgen continues to be larger than normal adult female degrees for months or many years. In males, these are typically regular late pubertal outcomes, and occur in Girls soon after prolonged periods of heightened amounts of cost-free testosterone during the blood. The consequences include:[30][31]

Misuse of those medicines can cause numerous uncomfortable indications and bring on prolonged-expression perilous health conditions, which include blood clots, stroke, and perhaps increase the chance of prostate most cancers.

The connection in between testosterone and aggression may additionally operate indirectly, as it's been proposed that testosterone isn't going to amplify tendencies to aggression, but rather amplifies what ever tendencies enables someone to keep up social status when challenged. In most animals, aggression could be the Special Deal usually means of retaining social position. Even so, individuals have multiple ways of getting position. This may clarify why some experiments discover a hyperlink involving testosterone and Professional-social behaviour, if pro-social conduct is rewarded with social standing. Hence the link among testosterone and aggression and violence is because of these remaining rewarded with social standing.[128] The relationship may also be among a "permissive influence" whereby testosterone does elevate aggression stages, but only while in the feeling of permitting common aggression amounts to get preserved; chemically or physically castrating the individual will decrease aggression ranges (nevertheless not remove them) but the individual only demands a small-standard of pre-castration testosterone to get aggression amounts to return to typical, which they're going to continue to be at whether or not further testosterone is added.