The low concentration of progesterone in the blood
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Name the 4 hormones involved in the menstrual cycle?
FSH, LH, oestrogen and progesterone
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What endocrine organs release these hormones?
FSH, LH -pituitary gland/ oestrogen, progesterone - the ovaries
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What effect does FSH have?
It causes the egg follicle to grow and mature
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What does the growth of the egg follicle cause?
The release of oestrogen from the ovaries
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What does the surge in oestrogen cause?
The release of LH from the pituitary gland
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What effect does LH have?
LH cause the egg follicle to break, which releases the egg, This is called ovulation
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Why does a rise in progesterone happen?
The corpus luteum, formally the egg follicle, releases progesterone
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What happens to levels of progesterone if an egg is fertilised?
The levels do not decrease so menstruation cannot occur, this means the uterine lining is thick for the growth of the embryo
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How does hormonal contraception work?
Progesterone and oestrogen are released from an injection which stops ovulation from occuring. Also, it can thicken mucus in the cervix and stop sperm from getting in
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Other cards in this set
Card 2
Front
Name the 4 hormones involved in the menstrual cycle?
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