The Menstrual Cycle Flashcards
What is stage 1 of the menstrual cycle?
DAY 1 IS WHEN THE BLEEDING STARTS.
How long does the uterus lining usually break down for?
AROUND 4 DAYS
What is stage 2 of the menstrual cycle?
THE LINING OF THE UTERUS BUILDS UP AGAIN FROM DAY 4 TO 14
What is stage 3 of the menstrual cycle?
WHEN AN EGG IS RELEASED FROM THE OVARY AT DAY 14
What is stage 4 of the menstrual cycle?
THE WALL IS MAINTAINED FOR AROUND 14 DAYS TO DAY 28
If no fertilised egg has landed on the uterus by day 28, what happens?
THE SPONGY LINING STARTS TO BREAK DOWN AGAIN AND THE WHOLE CYCLE STARTS AGAIN
What day is an egg released?
AT DAY 14
What are the three main hormones involved in a menstrual cycle?
FSH
LH
OESTROGEN
What is FSH?
FOLLICLE STIMULATING HORMONE
What is LH?
LUTENISING HORMONE
What does FSH cause?
AN EGG TO MATURE IN ONE OF THE OVARIES
What does FSH stimulate the ovaries to produce?
OESTROGEN
What does oestrogen cause the pituitary to produce?
LH
What does LH stimulate?
THE RELEASE OF AN EGG FROM THE OVARIES
Where is progesterone produced?
IN THE OVARIES