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* Two testes in an external scrotum.
 
* Two testes in an external scrotum.
* Testes descend into the scrotum in January and begin spermatogenesis.
+
* Testes descend into the scrotum at the beginning of the mating season (January) and begin spermatogenesis.
 
* Open inguinal canals throughout life.
 
* Open inguinal canals throughout life.
 
** Allows testes to shrink and return to the abdomen in the non-breeding season.
 
** Allows testes to shrink and return to the abdomen in the non-breeding season.
      
== Puberty and Sexual Maturity ==
 
== Puberty and Sexual Maturity ==
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