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GCSE Biology - Menstrual Cycle Cheat Sheet (DRAFT) by

This cheatsheet is about GCSE Biology - Menstrual Cycle

This is a draft cheat sheet. It is a work in progress and is not finished yet.


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Follicle stimul­ating hormone
Pituitary gland
Egg ripening and oestrogen production
Lining of the room to develop
Lutein­ising hormone
Pituitary gland
Egg release and proges­terone production
Lining of womb mainte­nance

Cycle Graph



Menstr­uation – loss of lining from the uterus, occurs at the start of the cycle if no fertil­isation has occurred
The lining starts to thicken
Ovulation occurs around the middle of the cycle (about day 14), the egg travels down the oviduct towards the uterus
The lining is maintained ready to accept a fertilized egg


Women over 50 are less likely to ovulate because they don't have high levels of oestrogen and high levels of oestrogen are needed for LH to build up.

Women are less likely to menstruate after the age of 60 because they too have low levels of oestrogen, so a uterus lining will not be built up so no lining will need to be lost.

How hormones control the menstrual cycle

At the start of the cycle, FSH causes the egg to develop in the follicle.
FSH is released from the pituitary gland.
As proges­terone and oestrogen levels are low, oestrogen starts to rise, causing the lining of the uterus to build up
The high levels of oestrogen cause a surge of LH
Proges­terone is produced from the corpus luteum, causing thelining of the uterus to be mainta­ined.
If an egg is fertil­ise­d,o­est­rogen and proges­terone levels remain high to maintain the lining of the uterus