contraception

Question 1

how can oestrogen be used to prevent release of an egg?

Answer 1

if oestrogen levels are high, production of fsh is inhibited
after a while egg development and production stop

Question 2

how does the contraceptive pill work
what are the advantages and disadvantages?

Answer 2

pill contains oestrogen and progesterone which inhibit release of LH and FSH
adv - highly effective
dis - must be taken everyday

Question 3

how does the contraceptive implant, patch or injection work?
what are the advantages and disadvantages?

Answer 3

contains progesterone which stops eggs from maturing or being released
adv- more convienient then taking a daily pill
dis- can have side effects

Question 4

what is the disadvantage of the pill, patch, injection and implant?

Answer 4

none of these protect against stds

Question 5

how does the intrauterine device (ITD) work?
what are the two types?

Answer 5

kill sperm and prevent embryos from implanting
plastic -> release progesterone
copper -> prevents sperm from surviving

Question 6

how do the barrier methods work?
what are the disadvantages and advantages?

Answer 6

prevent sperm from reaching egg
condoms and diaphragm
adv - because they don’t use hormones, they have no side effects
dis - can break or slip off

Question 7

explain the surgical methods of contraception?

Answer 7

sterilisation
males -> cutting or tying sperm duct
females -> cutting or tying fallopian tube

Question 8

explain the natural methods of contraception?

Answer 8

avoiding sex on days in menstrual cycle when women is most fertile