Contraception Flashcards
T/F Unintended pregnancy has increased over the last 20 yrs
True (from 45% to 49%)
Women who live below the poverty line are __x more likely to have an unintended pregnancy
Among what group of women has unintended pregnancies decreased?
5x
Middle income women
What are the most effective contraceptives?
LARCs (high initial price)
- Copper IUD
- Levonorgestorel IUD
- Etonogestrel implant
What are some considerations when prescribing contraception? (many!)
efficacy convenience cost accessibility non-contraceptive benefit side effects medical contraindications reversibility medical status reproductive desires
Which two forms of contraception do not cause unscheduled bleeding?
Male condoms
Diaphragm
How is the pregnancy rate determined when considering contraception?
The # of women, out of 100 women using this method of contraception, who will become pregnant over the course of 1 year
What are the barrier methods of contraception?
diaphragm
cervical cap
female
male condom (correct use 2%, typical use 18%)
What are the risks of barrier methods?
No systemic health risks
UTI association (diaphragm)
Possible local irritation from device or spermicide
What is the efficacy of barrier methods?
12-18% failure rate (typical use)
What is the cost (low, medium, high) of barrier method contraceptives?
Relatively low (device, spermicide)
What are non-contraceptive benefits of barrier methods?
STI protection w/ condom use
What are the 3 types of male condoms?
Latex (97%)
Natural membrane ($$$)
Synthetic ($$)
You (can/cannot) use oil based lubricants w/ latex male condoms.
What about natural made condoms?
What about synthetic condoms?
Can NOT
Yes you can!
YES!
T/F Natural made condoms definitively do not allow viruses to pass through
F: is may allow the passage of viruses (HIV)
___ must be fitted by a provider and fits the length of the vagina
What can cause a women to need a new size?
Diaphragm
Giving birth
Diaphragms have a ___% pregnancy rate and can be used for up to ___ years before they need to be changed out.
12%
2 years
What are the rules of diaphragm use?
Must be used w/ a spermicide
Should be inserted <2 hrs before intercourse
Should be left in place for at least 6 hrs after intercourse
What are some risks of using a diaphragm?
Increase incidence of UTI
Toxic shock syndrome (TSS) if left >24 hrs
Device may shift w/ pelvic relaxation
May increase susceptibility to HIV
Do you need a Rx for a cervical cap?
Yes
What determines the size you need for a cervical cap?
Whether the pt has given birth or not
How long is a cervical cap left in place after intercourse?
What is the max amount of time it can be left in place?
6-8 hrs
48 hrs
What is more effective–a diaphragm or a cervical cap?
A diaphragm
A vaginal sponge can be placed __ hrs prior to sex
What is the effectiveness of a vaginal sponge?
24 hrs
76-88%
What are the 2 ways that a vaginal sponge works?
- blocks sperm
2. releases spermicide
What hormones are used in hormonal contraception?
Estrogen
Progesterone
What are the delivery systems of hormonal contraception? (x6)
pill shot vaginal insert patch intrauterine implant
What are examples of estrogen-progestin hormonal contraceptives? (x3)
Combination OCP
Transdermal patch
Vaginal ring
What are example of progestin-only hormonal contraceptives?
Progestin-only OCs (“mini-pills”) DMPA (Depo-Provera) Implant (Nexplanon) IUD (Mirena, Skyla) Plan B emergency contraception
What are the 3 actions of estrogen-progestin contraceptives?
What is their efficacy?
- suppression of ovulation
- thinning of endometrium
- thickening of cervical mucus
Correct use: <1%
Actual use: 9%
what are the risks of estrogen-progestin contraceptives
who is at a greater risk?
MI, HTN
Ischemic stroke
Venous thromboembolism
Hepatic adenoma
What increases the risk for venous thromboembolism when using estrogen-progestin contraceptives?
Obesity >40 y/o Use of 3rd generation progestins (?) Hereditary thrombophilia --> Factor V Leiden, protein S deficiency **Ask about FHx!
OCs is associated w/ an overall increase ___ and ___ CA, and decreased risk of __ CA
Increased: Cervical and Breast
Decreased: Ovarian
What are contraindications to estrogen-progestin contraceptives?
Smoker >35 y/o Uncontrolled THN Hx of stroke or ischemic heart dz History of VTE Inherited thrombophilia Lupus (SLE) Migraine with aura Breast cancer Cirrhosis Liver tumor
**usually caused by the estrogen
What are side effects of estrogen-progestin contraceptives?
What is the most common side effect?
Breakthrough bleeding- Most common! Amenorrhea Nausea Breast tenderness Bloating HA
What causes breakthrough bleeding while on estrogen-progestin contraceptives?
Which form of contraception is a women more likely to experience this?
Thinning of the endometrium
Missed pills
Low-dose OCP or extended cycle OCP
How long can a woman expect to experience break through bleeding?
x3 cycles
What are non-contraceptive benefits of estrogen-progestin contraceptives?
Decreased
- menstrual bleeding
- dysmenorrhea
- incidence of ovarian cysts
- benign breast disease
- cancer risk: endometrium, ovary, colon
Improvement of
- PMS sxs (extended cycle)
- acne
Prevention of menstrual migraine (extended cycle)
Control of hirsutism
Management of uterine leiomyomata (fibroids)
Suppression of endometriosis
What makes combined OCs different from one another?
Amount of estrogen
Type of progestin
Pattern of delivery
Cost
What are the 3 ways that a patient can begin taking their OCPs? (i.e. day of the week)
Sunday start - avoid weekend menses
Quick start - not effective until 2nd week
1st day of menses start
What are the types of cycle control options you can offer?
21/7
24/4
12 week
continuous
As estrogen levels go (up/down), many side effects of OCs (HA, N, breast tenderness) go (up/down).
As estrogen levels go (up/down), rates of irregular bleeding on OCs go (up/down).
down; down
down; up
What drugs can interact w/ OCPs?
ANTICONVULSANTS
Phenytoin, phenobarbital, carbamazepine, topiramate decrease OCP effectiveness (liver enzyme induction)
ANTIBIOTICS
- Rifampin is the ONLY antibiotic proven to reduce estradiol and progestin levels in OC users
- No documented effect on hormone levels from other antibiotics (backup contraception ‘officially’ not needed) as long as the GI tract is functioning normally.
St John’s wort?*
Who should not take OCPs? Why?
Women >35 y/o who smoke; Risk of DVT/clotting
Estrogen-progestin patches are work for __ days and taken off for __ days
What is a disadvantage of using this method?
21/7
DVT risk is increased with this method
The patch has a (better/worse) steady state than OCPs?
Better
*they have the highest average serum levels of estrogen than all contraceptive methods
How often should the vaginal ring be changed?
What is the risk for using this method?
Monthly (21/7)
Increased vaginal discharge
What are progestin-only types?
What is the pregnancy rate?
Progestin-only OCs (“mini-pills”) DMPA (Depo-Provera) Implant (Nexplanon) IUD (Mirena, Skyla) Plan B emergency contraception`
Correct use: <1%
Typical use: 9%
How do progestin-only OCPs work?
- thicken cervical mucus
- thins endometrium
- variable suppression of ovulation
What is the rule w/ progestin-only pill?
Must take VERY regularly at the same time each day!
What are contraindications to progestin-only pills?
Breast CA
Undiagnosed abnormal uterine bleeding
active liver dz
No contraindications for women w/ hx of stroke, MI, DVT
What are side effects of progestin only pills?
Irregular bleeding
Amenorrrhea (no cycling w/ this method)
For what population of women are POPs good for?
Women who are breast-feeding
___ is a 3 month injection used for contraception
What is the pregnancy rate?
DMPA (‘Depo”)
Correct use: <1%
Typical use: 6%
What are the modes of action for DMPA (“depo”)? (x4)
- suppression of ovulation
- thickens cervical mucus
- thins endometrium
- decreases tubal motility
What are contraindications for DMPA (“depo”) use?
Breast CA
Undiagnosed uterine bleeding
Active liver dz
Osteoporosis or risk factors –> DMPA is associated w/ reversible (?) bone loss in long-term users (BLACKBOX)
What are side effects of DMPA (“depo”)?
Change in bleeding pattern
- Frequent, irregular bleeding x 6 months
- Subsequent amenorrhea (very common, esp @ 1 year)
Wt gain
HA
Mood changes
Increased w/ preexisting depression?
Unpredictable return to fertility (6 months-2 years)
- not the greatest choice for a 33 y o in grad school who wants to conceive a year from now
The common feature of highly-effective methods of contraception is that eliminate _____
User failure
What does LARC stand for?
What are examples of these?
Long-acting reversible contraceptives
Implant, IUD
____ is a progestin-only implant that has a __ yr effectiveness. It must be inserted and removed by trained providers
What is the pregnancy rate?
Nexplanon
3 yr
Correct use: <1%
Typical use: <1%
What is the mode of action for Nexplanon?
Thickens cervical mucus
Decreases tubal motility
Some inhibition of ovulation in early stages
Endometrial thinning
What are contraindications of Nexplanon use?
Breast CA
Undiagnosed abnormal uterine bleeding
Active liver dz
NO association between the etonogestrel implant and risk of MI, stroke or VTE
What are side effects of Nexplanon?
Unscheduled bleeding
- 15% will d/c use for this reason
- May persist for the life of the device
- Most women will have ~5 days of bleeding/month, not predictable
HA Wt gain Acne Breast tenderness Mood changes
T/F IUDs are commonlly used in the US
F, only 7% use this method
What is the pregnancy rate for IUDs?
What are examples of these? How long can they stay implanted for before removal?
Correct : <1%
Typical use <1%
Paragard: copper 10 yr method
Mirena: 5 yr
Skyla: 3 yr
What is the mode of action of IUDs?
Prevention of fertilization
- Device creates “hostile intrauterine environment”
- Toxic to ova and sperm
- Impairs implantation
- Not an abortifacient
Hormonal IUDs also
- Thicken cervical mucus
- Cause endometrial thinning
What are the advantages of using Paragard?
Superior for hormone-intolerant women
Most economical
Longest duration
What are the advantages of Mirena/Skyla
They decrease:
- menstrual bleeding
- dysmenorrhea
- pain from endometriosis
- sx from leiomyomata
What are contraindications to IUDs?
Active pelvic infection
Known or suspected pregnancy
Undiagnosed abnormal uterine bleeding
Severely distorted uterus
What are contraindications to use of paragard?
Wilson’s dz
Copper allergy
What are contraindications to Mirena/Skyla?
Current breast CA
What are adverse events that occur w/ IUDs?
Missing strings
Expulsion risk ~5%
- Sxs: cramping, abnormal bleeding, changes in string
- Confirm with pelvic ultrasound
Uterine perforation
- Usually at the time of insertion
- Recognition may be delayed
Partner discomfort
“Buyer’s regret”
Pelvic infection
- Risk limited to the insertion process (first 20 days after insertion
- Associated with STI (chlamydia, gonorrhea)– consider testing prior to insertion
- Long-term use of IUD is NOT associated with increased risk of pelvic infection
What are side effects of contraception for paragard?
Increase in dysmenorrhea and menstrual bleeding
What are side effects of Mirena/Skyla?
Irregular bleeding
Amenorrhea
Hormonal side-effects (Acne, weight gain, N, HA, breast tenderness, mood changes)
What are traditional methods of permanent sterilization?
Male = Vasectomy: safer, less cost, more effective
Tubal sterilization: 5x more common
Hysteroscopic sterilization
What are operative risks of female sterilization?
What about post-operative risk?
Bleeding
Infection
Damage to internal organs
Anesthesia complications
Ectopic pregnancy
What is the most common risk of female sterilization?
Regret
Occurs in 3-25%
What are examples of emergency contraceptives?
Plan B (levonorgestrel) – OTC
Ella (ulipristal) – Rx
ParaGard (copper) IUD – Office placement
Plan B can be used up to __ hrs post coitus and causes (harm/no harm) to an existing pregnancy
Is it Rx or OTC?
72 hrs
NO HARM
OTC
How does Plan B emergency contraception work?
Delays ovulation
Ella (uplipristal) can be used up to ____ hrs post-coitus and is (more/less effective) than Plan B
Is it OTC or RX?
120
MORE
Rx (pregnancy must be excluded)
How does Ella (ulipristal) work?
Anti-progestin
Delays ovulation
___ is the most effective post-coital method that inhibits fertilization and can be used up to __ days post-coitus
Is it OTC or Rx?
ParaGard IUD
5 days
Required office procedure and exclusion of pregnancy
Describe the MOA of mifepristone
progesterone and cortisol receptor antagonist
When P receptors are blocked, endometrium destabilizes despite the presence of a corpus luteum
Other than abortions, what is Mifepristone used for?
Control hyperglycemia secondary to hypercortisolism in Cushing’s syndrome who have failed or are not candidates for surgery
mifepristone is used alone or in combo with ____ about 3 days later to end early pregnancy
these can be dosed up to __ weeks after first day of last menstrual period and must be given in the providers office
misoprostol
9 weeks
What is the efficacy of Mifepristone and Misoprostol.
97% effective
Misoprostol is used to empty uterus (similar to early miscarriage) and will abort within __-__ hrs of taking misoprostol
4-5 hrs
what are some s/s of using mifepristone/misoprostol
Cramps heavy bleeding dizziness N/V/D abd pain
when should a woman f/u with their physician after taking mifepristone/misoprostol
w/i 2 weeks to confirm evacuation of pregnancy
otherwise D&C may be needed