Menstrual cycle
- Created by: Alice
- Created on: 12-05-13 13:30
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- 1) Uterus lining breaks down (period)
- Repair of uterus wall
- Egg released by the ovary
- Lining thickens waiting for a fertilised egg
- No fertilised egg so cycle starts again
- Empty follicle gradually disappears
- Drop in O and P triggers a period
- This triggers FSH in the pituitary gland to stimulate the growth of a new egg
- Drop in O and P triggers a period
- Progesteroneis produced by follicle to maintain the uterus lining
- If ferilisation occurs a placenta is formed which carries on producing progesterone to maintain the uterus wall
- Ovulation (egg released)
- The follicle develops into a corpus luteum which releases progesterone to maintain the uterus lining
- Lining thickens waiting for a fertilised egg
- Oestrogen is produced by the ovaries and causes uterus to thicken
- High levels of O stimulates production of LH from the pituitary gland. This triggers ovulation
- Egg released by the ovary
- Follicle with egg gradually develops
- Repair of uterus wall
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