LETTERS

摘要

I recently read the article "Estrogen in Men" in the November-December issue by Erik Wibowo and Richard Was-sersug. The subject appealed to me immediately, although I was left with a few unanswered questions at the end. I never knew that men had estrogen, let alone considered the role it had in the male body. As interesting as this subject was, the article left me curious about the role of testosterone in females. The authors state that it is the enzyme aromatase that transforms testosterone into estradiol. I'm curious to know whether females also have a type of enzyme that would convert estradiol into testosterone, or is it naturally produced in their tissues? I'm also curious to know how much levels of testosterone and estrogen need to decrease or increase in order to cause side effects. What are the ways that the body tries to cope with decreasing or increasing levels of these hormones?