The Menstrual Cycle

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What is the definition of the menstrual cycle?
The monthly release of an egg from a woman's ovaries, and the build-up and breakdown of the protective lining of the uterus
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What is the first stage of the menstrual cycle?
Day 1 is when the uterus lining begins to break down (usually lasts for about 4 days)
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What is the second stage?
The lining of the uterus builds up again (from day 4 to day 14)
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What is the third stage?
An egg is developed and then released (at day 14)
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What is the fourth stage?
The wall is then maintained (for about 14 days, until day 28)
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What happens if no fertilised egg has landed on the uterus wall by day 28?
The uterus lining starts to break down, and the cycle begins again
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Which three hormones are involved, and what do they stand for?
FSH (follicle-stimulating hormone), Oestrogen and LH ( luteinising hormone)
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What is the function of FSH?
It causes an egg to mature in one of the ovaries. It then stimulates the ovaries to produce oestrogen
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What is the function of oestrogen?
It causes the pituitary gland to produce LH. It then inhibits the further release of FSH
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What is the function of LH?
It stimulates the release of an egg at around the middle of the menstrual cycle
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Other cards in this set

Card 2

Front

What is the first stage of the menstrual cycle?

Back

Day 1 is when the uterus lining begins to break down (usually lasts for about 4 days)

Card 3

Front

What is the second stage?

Back

Preview of the front of card 3

Card 4

Front

What is the third stage?

Back

Preview of the front of card 4

Card 5

Front

What is the fourth stage?

Back

Preview of the front of card 5
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