menstrual cycle hormones

Question 1

fsh
(high at the start of the cycle then falls before rising at end of cycle)

Answer 1

Follicle stimulating hormone
released from pituitary gland
causes egg to mature in ovary
stimulates ovaries to release the hormone oestrogen

Question 2

oestrogen
( low at start of cycle then increases up to day 12 before decreasing again)

Answer 2

rekeased from the ovary
causes the lining of the uterus to develop
inhibits release of fsh- so only on egg matures in cycle
stimulates the pituray gland to release the hormone lh to allow ovulation

Question 3

lh
(low throughout cycle apart from peak at day 14 ovulation)

Answer 3

luteinizing hormone
released from pitiuary gland
causes mature egg to be released from ovary

Question 4

progesterone
(starts to decrease at day 14 and remains high until day 23)

Answer 4

released from the ovary
it maintains lining of the uterus during the middle part of the c ycle and during pregnancy
it inhibits release of fsh and lh to prevent eggs being matured and released until next cycle