Menstrual Cycle
- Created by: lucyscott36
- Created on: 14-12-20 20:36
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- Menstrual cycle
- Lasts 28 days and the egg is released on day 14 (ovulation)
- oestrogen
- causes thickening of the uterus to prepare for implantation of egg
- levels peak on day 10 then begin to fall
- FSH
- Causes the egg to mature
- LH
- Stimulatesthe release of the egg during ovulation
- a decrease in oestrogen causes LH and FSH to start increasing
- Ovulation occurs when LH and FSH levels peak
- Progesterone
- maintains the thick lining of uterus
- Inhibits the release of LH and FSH
- Egg matures on day 14 and progesterone starts increasing after this until it reaches its peak 3 days later
- if the egg isn't fertilised, levels fall and uterus lining breaks down into a period
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