1: Fertility Control - Contraception Flashcards
What guidelines cover contraception in under 16’s
Fraser guidelines
What do Fraser guidelines state
That an under-16 year old may be given contraception if:
a. understand doctor’s advice
b. cannot be persuaded to tell their parents
c. likely to continue intercourse without contraception
d. their mental or physical health will likely suffer
Therefore in their best interest the doctor prescribes contraception without parental consent
What age is a child considered unable to consent for sexual intercourse
under 13
What should happen someone under 13-years comes for contraception advice
child protection measures
What is the fertility awareness method
Individual has awareness of their menstrual cycles and uses this to plan when to have or avoid intercourse
If a person is using the fertility method and does not want to get pregnant when should they avoid sex
6d before and 2d after ovulation
What happens to cervical mucus around ovulation
Goes from being thin to becoming thick
What are the advantages of fertility awareness method
- Can be used in developing countries
- Approved by catholic religion
What is the problem with fertility awareness
- Heavily user dependent and often fails
- Cannot be used if irregular cycles
When do women usually need to start contraception after pregnancy
21 days
When is lactational amenorrhoea effective
If started less than 6 months, no supplementary formula is used and amenorrhoeic
When can POP be started post-partum
Immediately
If POP is started 21 days post-partum what should be done
Use additional contraception for two days
When is COCP absolutely CI
Breast feeding <6W post-birth
What is COCP not advised
Breast feeding 6W-6m
If COCP is started at 21d, what should be done
Use additional contraception for 7d
When should IUD be inserted
Within 48h of childbirth or after 4W
How does barrier contraception work
prevents sperm and ova meeting
What is the advantage of condoms
protects against STIs
What is a contraindication to condoms
latex allergy
What is the failure rate of condoms and what is the failure user rate
5% failure rate
15% user failure rate
What is the femidom
one end sits in the vagina and other just outside the vulva
What is the advantage of the femidom compared to the condom
less risk of tears
What does the femidom protect against
STIs
How long before sexual intercourse is the femidom inserted
8h
how effective is the femidom
95%
what is a diaphragm
a rubber cap that covers posterior fornix and anterior-inferior uterus - so covers the cervix
what is added with a diaphragm
spermicide
how long is a diaphragm inserted before intercourse
3h
what is the problem with diaphragms
requires fitting. If individual gains/looses weight or is pregnant, the femidom will not fit
what does diaphragms increase the risk of
UTI and STI
why do diaphragms increase risk of STIs
Diaphragm can irritate the vaginal mucosa increasing risk of STIs
what is the failure rate of diaphragms
6%
what is a cap
rubber cap that covers the cervix
what is given with a cap
spermicide
how long before intercourse is a cap inserted
2h
how long should a cap be kept in after
6h
what are two disadvantages of caps
Increase risk UTIs and STIs
why do caps increase risk of STIs
Due to causing inflammation of vagina
what is the failure rate of caps
9%
what are methods of hormonal contraception
Combined or Progesterone-only
what are the methods of combined contraception
- Oral
- Patch
- Injection
- Ring (IUD, IUS)
explain MOA of combined contraceptives
High doses of oestrogen and progesterone exert negative feedback on the HPA axis, thus preventing LH surge.
what is the role of progesterone on cervical mucus and progesterone
Progesterone thickens cervical mucus preventing passage of sperm. Inhibits endometrial proliferation
what happens in pill free interval
Drop in progesterone and oestrogen causes endometrium to shed
what is the oestrogen component of combined contraceptives
Ethinyloestradiol
what is the standard dose of ethinylestradiol in COCP
30-35ug
what is progesterone component of COCP
Norethisterone
Levonorgestrel
what does the combined contraceptive pill contain
Oestrogen and Progesterone
what are monophonic pills
Each pill contains same amount of oestrogen and progesterone
what are phasic pills
Oestrogen and progesterone levels vary between pills to replicate natural changes in cycle
what is most common COCP
Microgynon 30’
what does microgynon contain
35ug of ethinylestradiol and 150ug of levonorgestrel
explain taking microgynon
Microgynon is taken for 21d with a 7d pill-free interval
what is brevinor
35ug ethinylestradiol and 0.5ug levonorgestrel
how is brevinor taken
21d with 7d pill-free interval
What is the contraceptive transdermal patch
Oestrogen and progesterone patch put on the upper arm, abdomen or buttock to protect against pregnancy
What is ortho evra
It delivers 150ug norelgestromin and 25ug ethinyl estradiol
Explain ortho evra
Patch changed every 7d for a total of 3W. Then individual has a patch-free interval
if a women is in week 1-2 and delays changing the patch less than 48h what should be done
- Change patch as soon as possible
- No additional protection needed
If a women is week 1-2 and delays changing patch by 48h what should be done
- Change patch as soon as possible
- Contraception for 7d
If a women has unprotected intercourse in week 1-2 and patch is delayed change what is required
- Emergency contraception
explain what should happen if individual delays changing their patch in week 3
Take the patch free interval and apply patch at the start-date of the new cycle
explain what should happen if individual delays changing or applying patch in week 4 (patch free interval)
- Use contraception for 7d
What is the nuvaring
Combined contraceptive ring that sits in the vagina
Explain the nuvaring
Inserted for 21d and then removes for 7d
When should women start the COCP
Day 1-5 of their cycle
If taken during which time period is the COCP immediately effective
Day 1-5
If COCP is started after day 5 what is required
Contraception for 7d
Explain taking the COCP
Take the pill for 21d with 7d pill-free interval
How is the COCP taken
Same-time everyday
If individual has vomiting or diarrhoea on the COCP what should they do
Use additional contraception for 7d from onset of illness
How long should COCP be started post-partum
21-days
How long should COCP be started post-termination
7-days
If individual has missed one COCP pill what should be done
- Take pill as soon as possible
- Continue pack as normal
- No additional contraception
If individual has missed two or more pills what should she do about taking that pill
- Take pill as soon as possible. Even if that means two pills in one day
- Leave any earlier missed pills
If women missed >2 pills in day 1-7 and had sex what should be done
Emergency contraception required
If women missed >2 pills in day 8-14 and had sex what should be done
No need for emergency contraception
If women missed >2 pills in day 15-21 and had sex what should be done
Omit pill free interval
What is the principle of taking the COCP
Women needs to take the pill for 7 continuous days for it to be effective
What governs contraindications of contraceptives
UK medical eligibility criteria
What is UKMEC category 1
No restrictions
What is UKMEC category 2
Benefits > Risks
What is UKMEC Category 3
Risks > Benefits
If wanting to prescribe method with UKMEC category 3 guidance what is required
Referral to specialist contraceptive provider
What is UKMEC category 4
Harmful to prescribe this method
For the COCP what are 8 UKMEC 3 contraindications
BIG-DOGS PB:
BP: HTN Controlled
Immobile - Wheelchair Bound
Gall bladder disease at present
Diabetes >20-years
Obese: BMI >35
Genes: BRCA I or 2
PE or DVT in First-Degree relative under 45
Breast Feeding: 6-months
Smokes <15d and >35 years-old
For COCP what are 10 UKMEC 4 contraindications
BIB’s Mad Ship:
Breast cancer Immobility due to major surgery Breast feeding 6W Smoke >15d and <35 Migraine with aura Antiphospholipid Syndrome Diabetes over 20-years ago Stroke previously HTN uncontrolled IHD previously PE or DVT previously. Or, thrombophillia
If on what medication should patients NOT be given COCP
Lamotrigine
Why should patients on lamotrigine not be given the COCP
COCP reduces concentration of lamotrigine increasing seizure frequency
What other class of drugs does COCP interact with
CYP450 Inducers = reduce concentration COCP
If on CYP450 inducers, what should happen
Give a higher dose of ethinylestradiol (50ug)
Or reduce pill-free interval to 4d
What is a side effect of COCP and how can this be reduced
Spotting for first 3-4m.
Reduce by taking the pill at the same time every day
What are 3 side effects of COCP
Weight gain
Spotting
Headaches
What does COCP immediately increase risk of
VTE
What two cancers does COCP DEcreasee risk of
Colorectal cancer
Ovarian cancer