emergency contraception Flashcards
What are the 3 ways to prevent pregnancy?
1) prevent sperm
2) prevent ovum
3) prevent implantation
How does emergency hormonal contraception work?
by inhibiting/postponing ovulation
What is the non-hormonal option for emergency contraception?
copper IUD (intrauterine device)
What are the hormonal options of emergency contraception?
1) ulipristal acetate
2) levonorgestrel
How does the copper IUD work?
1) kills sperm
2) prevents implantation
How long after intercourse can a copper IUD be inserted?
up to 5 days
What is the efficacy of copper IUDs?
over 99%
How long after ovulation can the egg remain in the fallopian tube?
12 to 24 hours
How long can sperm cells survive in a woman’s reproductive tract?
up to 5 days
What percentage of women ovulate on day 14?
12%
What percentage of women ovulate between days 12 and 16?
49%
levonorgestrel
synthetic progestogen hormone (antagonist of the progesterone receptor)
How does levonorgestrel work?
inhibition/delaying of ovulation
ulipristal acetate
orally-active synthetic selective progesterone receptor modulator which acts via high-affinity binding to the human progesterone receptor
How does ulipristal acetate work?
inhibition/delay via suppression of the LH surge