Human Hormones

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  • Human Hormones
    • Menstrual Cycle
      • FSH- Follicle stimulating hormone
        • Stimulates the development of an egg inside a follicle
          • Stimulates the ovary to release oestrogen
            • Made and secreted by the Pituitary Gland
      • LH- Lutenising hormone
        • causes ovulation
          • Made in and secreted by the Pituitary Gland.
      • Oestrogen
        • Causes uterus lining to thicked
          • inhibits the production of more FSH
            • stimulates the pituitary gland to produce more LH
      • Progestergene
        • Helps to maintain the womb lining
          • Production of progestrerone stops, the lining of the womb breaks down.
    • Fertility
      • In vitro Fertilisation
        • The woman is given FSH so that her eggs produce more eggs.
          • These eggs are collected and then fertilised by a sperm in vitro.
            • The fertilised eggs develop into embryos a few healthy ones are implanted in to the woman's uterus.
      • Oral Contraception
        • Contraceptives contain hormones that prevent the release of eggs.
          • The oestrogen is there to inhibit the production of FSH so that nmo eggs mature.
            • If no eggs mature then no ovulation and the eggs can be fertilised by sperm cells thus fertilisation will not occur
      • Fertility Drug
        • Hormones can be given to stimulate egg release from ovaries
          • A common cause of infertility is low levels of FSH, which means that the eggs do not mature or be released
            • FSH may be given as a 'fertility drug' to a woman whose FSH is to low to stimulate the release of mature eggs.
    • Homeostasis
      • This is controlling:core body temperature, blood glucose levels, blood water content, blood ions/ salt content, blood PH
        • Maintaining a steady state, Keeping conditions controlled


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