hormonal contraception

contraception is

method used to stop sperm meeting egg and fertilising it

combined oral contraception contains

oestrogen and progesterone

the role of oestrogen in combined oral contraception is

if taken continuously oestrogen naturally inhibits fsh so there will be no egg mature enough to be released

the role of progesterone in oral combined is

creates a thick mucus making it hard for sperm to reach egg

disadvantages

side effects nausea headaches taken daily no protection against sti

advantage

99% effective progesterone only = less side effects

contraceptive patch

last 1 week on skin of arm does same thing

contraceptive implant

progesterone only, lasts 3 yrs

the progesterone in implant causes

harder for egg to implant ovaries stop releasing eggs harder for sperm to reach egg - as progesterone inhibits fsh and lh

injection

same as implant but lasts 2-3 weeks

intrauterine device

up to 10 years, in uterus kills sperm stops egg implanting

copper iud

stops sperm surviving in uterus

plastic iud

releases progesterone