University of Kentucky College of Agriculture Agripedia
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Estrogen is the hormone produced by the follicle growing on the ovary that is responsible for the secondary sex characteristics in the female:

  • absence of muscle development
  • development of mammary glands
  • development of reproductive systems and external genitalia
  • fat deposition on hips and stomach (source of energy)
  • triggering of estrous cycle at puberty
  • triggering of heat
  • depresses FSH production when follicle is mature

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