Reproductive Hormone Secretion

• Follicle-Stimulating Hormone (FSH) & Lutenising Hormone (LH)


  FSH + LH = gonadtropins released from the anterior pituitary

  these hormones act in both sexes, but in diff concs

  FSH + LH act on specific cells in the gonads where they stimulate gamete production + sex hormone secretion
• Testosterone & Oestrogen


  sex hormones act as target tissues in the body

  they also exert neg feedback on the hypothalamus + anterior pituitary
• HPG Axis


  between each level of the HPG axis, hormones regulate the secretion of other hormones

  in both sexes, the basic pattern is the same
• Gonadtropin-Releasing Hormone (GnRH)


  GnRH = released from the hypothalamus, indirectly stimulates the testes/ovaries via its effect on FSH + LH release

  GnRH reaches the anterior pituitary cells via the hypophyseal portal system