Contraception Flashcards
How many pregnancies are unintended?
43%
Average menarche
12.5
Average menopause
51.5
OCP MOA
Ethinyl Estradiol and progesterone prevent midcycle surge of LH and FSH and stop ovulation from occurring.
Usual OCP cycle
21 days on, 7 off
Lactating women get which pill?
Mini pill
Just progestin
When to start taking pill
The first sunday after period
Must use back-ip contraception for how long after starting pill?
7-14 days
If they miss 1 pill?
Still protected
If they miss 2 pills?
Need to use back-up for rest of cycle
Absolute contraindications to pill
Thromboembolic event previously Estrogen dependent tumor Liver dz Pregnancy Women > 35 who smoke or have migraines Known CVD
OCP lowers risk of?
Dysmenorrhea Iron deficiency anemia Ectopic preg Ovarian CA Benign breast dz Endometriosis
OCP failure rate
Theoretical: .1%
Actual: 8%
OCP SE
Nausea Breast tenderness Spotting Amenorrhea Fatigue HA Depression Decreased libido
Which med class interact w/ OCP’s
Anticonvulsants. except:
Gabapentin, lamotrigine, others
WHich abx decrease efficacy of OCP
Rifampin
Tetracycline
PCN’s
Cephalosporins
Contraceptive patch
20mcg estradiol
150mcg norelgestromin
Worn for 3wks, 1 week off
Progestin only MOA
Inhibits gonadotropin secretion
Creates thin, atrophic endometrium
Ovum transport may be slowed
Progestin only advantages
Scant or no menses
Decreased anemia
Decreased dysmenorrhea
Fewer drug interactions
Progestin only indications
Breastfeeding
Older women
Adolescents
Women who cannot take estrogen (smokers, migraines, SLE)
Depo-provera black box
Bone density decrease
Depot Medroxyprogesterone Acetate
DMPA, Depo-provera
IM or SQ injections every 3 months
Use back up for 3 days after injection
How long may fertility be delayed after stopping DMPA
18 months
Progesterone implant
Single rod w/ slow release or 68mg etonogestrel.
Lasts for 3 yrs
IUC
Intrauterine contraception
Approved for 3-5 yrs
Irregular bleeding as SE
Non-hormonal IUC
Paragard
Approved to remain in place for 10 yrs
Used in women who cannot use hormonal
SE: Heavy menses, dysmenorrhea
Diaphragm efficacy
Theoretical: 6%
Typical: 16%
Does emergency contraception interrupt pregnancy?
No, it is ineffective once implantation has occured.
How long after event can EC be taken?
up to 120 hrs