Hormones

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  • Hormones
    • Chemical substances that regulate processes in the body
      • Secreted by glands and travels to target organs in the bloodstream.
    • Menstrual Cycle
      • Several hormones control this cycle, which includes controlling the release of an egg each month from an ovary, and changing the thickness of the uterus lining.
        • These hormones are secreted by the ovaries and pituitary gland.
      • FSH
        • Secreted in the Pituitary Gland
        • Causes the egg to mature in the ovary.
        • Stimulates ovaries to release oestrogen
      • Oestrogen
        • Secreted by the ovaries
        • It stops FSH being produced- so that only one egg is released.
        • Stimulates the pituitary gland to release LH, which triggers ovulation.
          • OVULATION :the release of the mature egg from the ovary.
      • LH
        • Causes egg to be released from the ovary
        • Secreted in the pituitary gland
    • Controlling Fertility
      • Oral contraceptive -"the pill"
        • Contains oestrogen which stops the production of FSH, which stops an egg maturing
        • Some may suffer from changes in weight, mood and blood pressure, as a result of the hormones in it.
          • There is also a chance of an increased risk of developing blood clots.
            • Evidence that the risk of developing cancer of the uterus or ovaries is lowered.
      • Fertility Treatments
        • Contains FSH which stimulates eggs to mature
        • Used to help women get pregnant.
        • May not always work
          • The treatment boosts the production of mature eggs, multiple conceptions  can occur.
            • Increased risk of complications in pregnancy  and may lead to premature or underweight babies.
      • IVF
        • The egg is fertilised outside the woman’s body and then implanted back into her uterus.
          • Some people are concerned that couples may only want fertilised eggs with 'desirable' qualities.

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