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  2. Human penis size - Wikipedia

    en.wikipedia.org/wiki/Human_penis_size

    But after puberty, administration of testosterone does not affect penis size, and androgen deficiency in adult men only results in a small decrease in size. [56] Growth hormone (GH) and insulin-like growth factor 1 (IGF-1) are also involved in penis size, with deficiency (such as that observed in growth hormone deficiency or Laron syndrome ) at ...

  3. Testicular atrophy - Wikipedia

    en.wikipedia.org/wiki/Testicular_atrophy

    Anabolic steroid use and testosterone replacement therapy (TRT) have been found to cause testicular atrophy through similar mechanisms. [2] [1] [17] Anabolic steroids and TRT are both used (either by prescription or illicitly) to mimic the effects of testosterone produced by the body, such as building muscle and maintaining sex drive.

  4. Tanner scale - Wikipedia

    en.wikipedia.org/wiki/Tanner_scale

    Due to natural variation, individuals pass through the Tanner stages at different rates, depending in particular on the timing of puberty.Among researchers who study puberty, the Tanner scale is commonly considered the "gold standard" for assessing pubertal status when it is conducted by a trained medical examiner. [5]

  5. Anabolic steroid - Wikipedia

    en.wikipedia.org/wiki/Anabolic_steroid

    Some examples of virilizing effects are growth of the clitoris in females and the penis in male children (the adult penis size does not change due to steroids [medical citation needed]), increased vocal cord size, increased libido, suppression of natural sex hormones, and impaired production of sperm. [141]

  6. Testosterone - Wikipedia

    en.wikipedia.org/wiki/Testosterone

    Testosterone is the primary male sex hormone and androgen in males. [3] In humans, testosterone plays a key role in the development of male reproductive tissues such as testicles and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.

  7. File:Male penis erection.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Male_penis_erection.jpg

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  8. Arnold Schwarzenegger has spoken out about his history with drug use, with the actor encouraging bodybuilders not to use steroids.. The 75-year-old reflected on his days as a bodybuilder during a ...

  9. Growth hormone deficiency - Wikipedia

    en.wikipedia.org/wiki/Growth_hormone_deficiency

    Newborns may also present low blood sugar or a small penis size. [2] In adults there may be decreased muscle mass, high cholesterol levels, or poor bone density. [1] GHD can be present at birth or develop later in life. [1] Causes may include genetics, trauma, infections, tumors, or radiation therapy. [2]