Female Hormones

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  • Created by: Annie
  • Created on: 05-03-13 17:53
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  • Hormones
    • Special chemicals which coordinate many processes in your body.
    • Special glands create and secrete hormones. Hormones are carried around the body to target applicable organs
    • Hormones act quickly but effects are slow and long lasting.
    • Menstrual Cycle
      • Controlled by hormones made in pituiarty gland and ovaries.
      • Levels of hormones rise and fall this effects the way the body works.
      • Menstrual cycle - 28 days. Each month lining thickens to support baby. Egg starts maturing in ovary.
      • 1. After 14 days, after egg starts maturing, it is released from ovary. This is called OVULATION. Lining stays thick for several days after egg is released.
      • 2. If egg is fertilised by sperm. Pregnancy may occur. Womb provides protection and food for developing embryo.
        • 2i. If NOT fertilised dead egg and lining of womb are discarded. This is called period.
      • HORMONES IN MENSTRUAL CYCLE
        • Once a month a surge of hormones from pituarty gland in brain starts eggs maturing in the brain. Hormones stimulate ovaries to produce female sex hormone oestrogen
        • FSH is secreted by Pituiarty gland. It makes eggs mature in ovaries and stimulates ovaries to produce oestrogen.
        • Oestrogen is secreted by ovaries. It stimulates womb to build up ready for pregnancy. It stops FSH production.
        • Progesterone and lutenising hormone (LH)
    • Hormones released by P.Gland and ovaries control what happens in cycle.
      • When Oestrogen levels rise, they stop FSH production+ encourage LH production by P gland. When LH levels reach a peak in cycle they release a mature egg.

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