• What could be the explanation?
  • The researchersí theory is that atrazine may increase the levels of an enzyme called aromatase. This enzyme converts testosterone, the male sex hormone, to estrogen, the female sex hormone.
  • This would explain why blood levels of testosterone in atrazine-treated male frogs are so low.
  • But, this hypothesis needs to be tested to see if aromatase levels are actually higher in atrazine-treated frogs.
  • Does this potential hormone disruption have any implication for humans?