contraception

Question 1

contraception

Answer 1

• prevention of fertilisation

Question 2

how do contraceptives work?

Answer 2

• prevent egg release
• prevent sperm reaching egg
• prevent embryo implantation
• other methods

Question 3

prevent ovulation

Answer 3

• the pill

- hormones preventing ovulation

Question 4

prevent sperm reaching the egg

Answer 4

• sterilisation : vasectomy (cut vas deferens); tubal ligation (fallopian tubes are tied off)
• condom : barrier device; protection against STI’s
• male condom : non-porous; rubber sheath; spermicide
• female condom : elongated balloon; STI protection
• spermicide : chemicals that kill sperm
• diaphragm : barrier device; shallow bendable cup

Question 5

prevent embryo implantation or development

Answer 5

• morning after pill : started within 72 hours; oestrogen-progesterone combination confuses the boyd
• intrauterine devices : plastic, copper or stainless steel; inserted into uterus; prevents implantation of blastocysts
• mifepristone : blocks the action of progesterone resulting in the endometrium disintegrating

Question 6

other contraceptive devices

Answer 6

• injectables : progesterone injections
• easy, no precautions
• rhythm method : menstrual cycle tracking; least effective; greater chance to acquire an STI