reproductive hormones Flashcards
what is puberty
examples are ….
period in which adolescents start to develop secondary sexual characteristics
facial hair in men
breasts in women
what are the main reproductive hormones for men and women
for men it is testosterone which is released from the testes and where stimulating sperm production happens.
in women it is oestrogen which is produced by the ovaries
how many stages are there on the menstrual cycle
there are 4 stages which have 4 hormones for each stage
what is the average length in the menstrual cycle
28 days but varies from people to people
what is stage 1 knowing as and what happens
it is known as menstruation.
it is the period of bleeding that normally lasts 4 days.
it is the break down of uterus lining
stage 2 in the menstrual cycle is
when women prepare for a fertilised egg and the lining starts to build up in the uterus
stage 3 is known as
what is it
how long does it last
known as ovulation
lasts 1 day
involves the egg being released from one of the ovaries
stage 4 how long does it last and what does it involve
it lasts from the 14th day usually to the 28th day
it involves maintaining the lining of the uterus
what happens if there in no fertilised egg
the uterus lining starts to break down and the whole stage starts all over again
if there was a fertilised egg what happens
if there was a it would slowly implant into the uterus lining and slowly develop into a fetus
the cycle would stop because the women is now pregnant
what are the four hormones and what do they do
oestrogen is produced in the ovaries it stimulates the uterus lining to grow
progesterone which is also produced in the ovaries increases in stage 4 and maintains the lining of the uterus
the other two hormones are the luteinising hormone and the follicle stimulating hormone both produced in the pituitary gland
role of fsh is to stimulate one of the eggs to mature in one of the ovaries
while lh stimulates the release of that egg on day 14
how do these hormones interact with eachother
FSH stimulates the ovaries to produce oestrogen which is why we see higher levels of FSH just before oestrogen starts to increase
so oestrogen starts to inhibit FSH basically decreases it.
when oestrogen levels get high it stimulates the release of LH which causes this LH spike and is the cause for ovulation
progesterone inhibits both LH and FSH
which hormone stimulates the uterus lining to develop
oestrogen
which hormone stimulates the egg to be released around day 14
LH(luteinising hormone)
