<big><center>[[Reproductive System|'''BACK TO REPRODUCTIVE SYSTEM''']]</center></big>
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<big><center>[[Reproductive_System#Exotics|'''BACK TO EXOTICS''']]</center></big>
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<big><center>[[Exotics_-_Avian_Reproductive_Anatomy_and_Physiology_-_Anatomy_%26_Physiology|'''BACK TO AVIAN REPRODUCTIVE ANATOMY & PHYSIOLOGY''']]</center></big>
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<big><center>[[Exotics_-_Reproduction_in_the_Male_Avian_-_Anatomy_%26_Physiology|'''BACK TO MALE AVIAN REPRODUCTIVE ANATOMY & PHYSIOLOGY''']]</center></big>
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* Testes under the influence of '''FSH and LH'''.
* Testes under the influence of '''FSH and LH'''.
* '''Leydig cells''' produce Testosterone and Androstenedione under the influence of '''LH'''.
* '''Leydig cells''' produce Testosterone and Androstenedione under the influence of '''LH'''.
** Provide '''secondary sex characteristics''' like coloration and song during courtship.
** Provide '''secondary sex characteristics''' like coloration and song during courtship.