Menstrual Cycle

Question 1

what is the menstrual cycle

Answer 1

• monthly events in which a female releases an egg and prepares uterus for fertilisation

day one: menstruation, lining of uterus is broken down
day two: uterus is repaired and thickened for egg to be planted
day three: ovulation egg is released from ovary
day four: lining is maintained from day 14 till 28 incase of fertilisation or uterus lining will break down again

Question 2

what are the four hormones involved in menstrual cycle

Answer 2

• FSH
• Oestrogen
• LH
• Progesterone

Question 3

what does the FSH do

Answer 3

• released by pituitary gland it causes the follicle to mature and produces oestrogen

Question 4

what does oestrogen do

Answer 4

• it is produced in the ovaries it causes lining of the uterus to thicken and grow
  cause LH surge

Question 5

what does LH do

Answer 5

• produced by pituitary gland

releases the egg and remains of follicle develop into corpus luteum which produces progesterone

Question 6

what does progesterone do

Answer 6

formed by corpus leteum after ovulation
maintains the lining of the uterus
inhibits FSH and LH
THIS CAUSES PROGESTERONE TO FALL and low oestrogen causing uterus lining to break down
low progesterone means FSH is increased so recycle

if egg not fertilised, oestrogen less and menstruate or else progesterone is produced by corpus bc if not pregnant will be prevented