Males

• Testosterone


  Male reproductive hormone produced by the testes
• Testosterone levels rise


  Changes are trisseral and male secondary sexual characteristics develop
• Changes during puberty


  • Growth spurt
  • Pubic hair
  • Underarm hair
  • Facial hair
  • Larynx gets bigger
  • Voice deepens
  • External genitalia develop
  • Skin darkens
  • Testes grow
  • Shoulder and chest broaden
  • Brain matures
  • Active sperm production