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  • Created by: NWILKA1
  • Created on: 27-05-14 16:06
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  • Hormones
    • Secreted by glands
    • Transported to target organs in the blood stream
    • FSH
      • Secreted by the pituitary gland
      • Causes an egg to mature in the ovaries
      • Stimulates ovaries to produce oestrogen
    • LH
      • Stimulates the release of eggs from the ovaries.
    • Oestrogen
      • Secreted byt the ovaries.
      • Inhibits further production of FSH
    • Regulate the functions of many organs and cells
      • Release of an egg from the ovaries
      • Changes in the thickness of the lining of the womb
    • Controlling fertility
      • Oral  contaceptives
        • Contain hormones that inhibit the production of FHS
          • No eggs mature.
        • May contain oestrogen and progesterone to inhibit egg maturation
        • First birth control pills had high levels of oestrogen
          • This caused signifcant side effects,
          • Now contain much lower does of oestrogen, or are progesterone only.
    • Progesterone
      • Secreted by ovaries.
      • Maintains lining of the uterus during middle part of the mentrual cycle and during pregnancy.


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