Edexcel IGCSE Biology · Spec 3.9
The Menstrual Cycle
The stages of the menstrual cycle and the changes in the ovaries and the lining of the uterus.
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The Menstrual Cycle
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Spec 3.9
What you need to know
- Describe the main events of the menstrual cycle
- Explain the role of the hormone oestrogen
- Explain the role of the hormone progesterone
Active recall
Quick check
Answer each question before opening the answer.
What happens around day 14 of the menstrual cycle?
Ovulation — an egg is released from the ovary.
What happens to the uterus lining if the egg is not fertilised?
It breaks down and is lost through the vagina (menstruation).
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