Contraception Flashcards
What need to know for OSCEs each contraception
Options
Suitability - contraindications and risks
Effectivemess
Mechanisms of action
Instruction on use
Methods of contraception
Family planning
Barrier - condoms
COCP
Progesterone only pills
Coils
Progesterone injection
Progesterone implant
Surgery - sterilisation, vasectomy
Emergency contraception
What is UKMEC
UK medical eligibility criteria - categorise risks of starting different contraception in different individuals
UKMEC levels
1 - no restricition in use (minimal risk)
2 - Benefits generally outweigh benefits
3 - Risks generally outweigh benefits
4 - unacceptable risk - contraindicated
Which contraceptive methods are user dependent for effectiveness
Family planning
Barrier
Pill
What contraceptives are not user dependent for effectiveness
Implant
Coil
Surgery
What does 99% effective contraception mean
Used correctly with regular partner for single year, 1% chance of getting pregnant
What contraception is >99% effective with perfect and typical use
Surgery
coils
Progesterone implant
What contraception avoid if high risk breast cancer?
Avoid hormonal contracepetion
Copper coil or barrier methdos
What avoid if high risk of cervical or endometrail cancer
Avoid intrauterine system (mirena coil, copper coil)
What contraception avoid in Wilsonds disease
Acoid copper coil
What risk factors are UKMEC 4 for the COCP?
Uncontrolled HPTN esp >160/>100
Migraine with aura
History of VTE
>35 years, >15 cigarettes per day
Major surgery w prolonged immobility
Vascular disease or stroke
Ischaemic heart disease, cardiomyopathy and atrial fibillation
Liver cirrhosis and liver tumours
SLE and antiphospholipid syndrome
Is HRT a contraceptive
No - additional contraceptive required on top of it
What age can the COCP pill be used up to
50
Why does teh depot injection have to be stopped before 50
Risk of osteoporosis
When should women a=who are amenorrheic and taking progesterone only contraception stop
FSH blood test >35 IU/L on two tests 6 weeks apart - 1 more year continue
>55
Why is depot injectio and coils n UKMEC 2 under 20
injection- bone mineral density
Coils - higher rate expulsion
What is UKMEC 1 for under 20
COCP or progesterone pills
Profesterone implant
When is contraception required after birth
21 days
What need to do when starting pills after pregnancy
Condoms 7 dyas - COCP
2 days - progesterone
How long is lactaitonal amenorrhea considered effective contraception
6 months
Fully breastfeeding and amenorrheic
What contraceptivs are safe and insage with breastfeeding
Porgesterone only pill and implant are safe
COCOP NOT SAFE
How long after pregnancy before can start COCP
UKMEC 4 before 6 weeks PP
UKMEC 2 after
When can copper coil or mirena coil be inserted after birth
Within 48 hours or more than 4 weeks after birth - UKMEC 1
If in between UKMEC 3
WHY
How effective are condoms typical vs perfect use
98% perfect
82% typical
What can make condoms more likely to ttea
Oil based lubricants damage latex condoms
How are diaphragms and cervical caps ised
How effective
Fitted before sex - silicone cups sit over cervix
leave in place 6 hours after sex
Used with spermicide gel + perfect = 95% effective
Can u use diaphragm or cap and condom
What is option for oral sex
Dental dam
How effective is the COCP with perfect use or typical use
99% effective - perfect
91% - typical use
How does COCP prevent pregnancy
Prevent ovulation - primary
Progesterone thickens cervical mmucus
And inhibits proliferation of endometrium reducing chance successful implantation
What effect does oestrogen and progesterone have on other reproductive hormones
Negative feedback -> hypothalamus and ant pituiatry, supress release of GnRH, LH and FSH
Prevent ovulation
What is a withdrawal bleed
Endometrial lining maintatined while taking pill - when come off have withdrawal bleed
What types of COCP are there
Monophasic pills - same amount hormones each oill
Multiphasic - varying amounts hormones to match cyclical hormonal changes more closely eg vary oestrogen and type progesterone
What do everyday formulations monophasic pill packs contain
seven inactive pills - take one everyday dont have to worry youreself
Examples of monophasic combined pills
- Microgynon contains ethinylestradiol and levonorgestrel
- Loestrin contains ethinylestradiol and norethisterone
- Cilest contains ethinylestradiol and norgestimate
- Yasmin contains ethinylestradiol and drospirenone
- Marvelon contains ethinylestradiol and desogestrel
First line COCP NICE
Levonorgestrel or norethisterone - microgynon or leostrin
Lower risk VTE
What type of progesterone in COCP first line fro PMS
Drospirenone eg yasmin
Why dropirenone used pMS
Anti-mineralcorticoid and anti-androgen activity
Help with bloating, water retention, modd changes
Continious ise
What progesterone type in COCP targets acne and hirsutism and hwy
cyproterone aceteate eg dianette
Anti-androgen effects
Why is dianette stopped after 3 months
1.5-2 times higher risk VTE than first line COCP
Common regime optinos for COCP
21 days on 7 dyas off
63 days/3 packs on, 7 dyas off
Continious use
Side effects and risks of COCP
Unscheduled bleeding common in first 3 months - settles
Breast pain and tenderness
Mood changes and depression
Headahces
HPTN
VTE
Small increased risk breast and cervical cancer, returns to normal 10 years after stopping
Small increased risk MI and stroke
Benefits of COCP
Effective
Rapid return to fertility
Improvement in premnestrual sy,ptoms, menorrhageia, dysmenorrhea
Reduced endometrial, ovarian and colon cancer
Reduced risk benign ovarian cysts
What is BMI >35 UKMEC for COCP
3
What is BMI >35 UKMEC for COCP
3
How effective are the pills with perfect vs typical use
Perfect >99%
Typical - 91%
How efefctive are depot injection use
Percet - >99%
tYPical 94%
How effective is natural family planning perfect vs typical use
95-99.6% effective if perfcet
Typical use - 76%
When do you require extra protection and not when strating the pill
Start of dirst day of cycle up to day 5- none extra needed
After day 5 - contraception for first 7 days before protected. Have tom check not already pregnant
What do when switch COCPs
Immediately start next pack with no break
What do when switch traditional POPs
Switch any time but 7 dyas extra contraception ie condoms jeeded and ensure not pregnant before switching
Why no extra protection needed when switching from desogestrol
Stops ovulation = no additional contraceptiona needed
When is a pill considered missed
More than 24 hours late, 48 hours since last pill taken
What do if miss one pill - less than 72 hours since last pill taken
Take missed pill asap even if take two on same day
No extra protection needed
What do if miss more than one pill >72 hours since last pill taken
Take most recent missed pill asap even if take 2 same day
Additional contraception needed untul taken reguarly for 7 days straight
What do if days 1-7 missed pills
Emergency contraception if unprotected sex
If days 8-14, 15-21
8-14 - and day 1-7 fully complucant, no emergency contraception needed
15-21 - same (8-14 comlicant). Go back to back with next pack pills and skip pill free period
Technically no extra protection needed but recommended
How are POPs taken
Continiously
How are POPs taken
Continiously
What is the only UKMEC 4 for POP
Active breast cancer