Key Stage 3
Meaning
The menstrual cycle is the changes that happen to the female reproductive system every 28 days.
About the Menstrual Cycle
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| In the first 6 days of the menstrual cycle the uterine wall leaves through the vagina. This is often called a 'period'.
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On day 7 an ovum begins to mature and the uterine wall starts to build back up again.
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The uterine wall continues to build up.
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The uterine wall continues to build up.
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| The uterine wall continues to build up.
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The ovum is released from the ovary.
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The ovum travels down the oviduct.
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If the ovum is not fertilised the uterine wall breaks down.
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| A graph showing the relative thickness of the uterine wall through the 28 days of the menstrual cycle.
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