menstrual cycle

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  • Created by: frejwhit
  • Created on: 05-06-19 18:17
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  • Menstrual Cycle
    • Key Hormones
      • FSH
        • released by pituitary gland
        • Causes egg in ovary to mature
        • stimulated production of oestrogen
      • Oestrogen
        • Produced in ovaries
        • causes development of uterus lining
        • inhibits production of FSH
        • stimulates production of LH
      • LH
        • Produced by pituitary gland
        • stimulates the release of a mature egg
          • Ovulation
      • Progesterone
        • produced in ovaries after ovulation
        • maintains lining of uterus
        • when levels drop, uterus lining breaks down
        • stops release of LH and FSH
    • Stages
      • stage 1
        • days 1-4
        • uterus lining breaks down
      • Stage 2
        • day 4-14
        • uterus lining starts to build up agains
      • stage 3
        • day 14
        • ovulation happens
          • egg is released from one of the ovaries
      • stage 4
        • day 15-28
        • uterus lining maintained
          • ready for arrival of fertilised egg
        • lining breaks down if no fertilised egg attaches to lining

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