Contraceptives Flashcards
Days of peak fertility in a 28 day cycle?
day 9-15
Immediately reversible forms of BC
IUD, condom, OCP, NFP
Which form has lowest failure rate
Implants < 1%
IUD also very low
How do progestin only methods work?
Blocks GnRH –> LH suppression
Increases cervical mucus thickness
How do combo E/P pills work?
P: dec GnRH, thick mucus, atrophic endometrium
E: dec FSH, LH suppression
Contraindications to combo pills
HTN Breast cancer hx Migraine with aura Liver dz Ischemic heart dz >35 y/o smokers Uncontrolled DM
AE of combo bills
N/V, HA, breast enlargement, libido changes, bleeding, acne, hirsutism
Secondary benefits of combo pills
Acne, lighter period, less cramps, bone protection, less risk of ovarian/endometrial cancer
How do copper and LNG-IUDs work?
Copper: reduces sperm motility/viability
LNG: inhibits ovulation, thick mucus, less motility
Contraindications to IUDs
Anemia/heavy period
Current STI
Large fibroids
Wilson’s dz
AE of IUD
Uterine perforation Expulsion Cramping PID Heavy periods (Cu) Irreg spotting (LNG)
Which EC is effective for all weight classes?
Copper IUD
High doses of estrogen can cause..
Thromboembolism (smokers, 35+) Endometrial CA (without progestin)
AE of progestin only preps
Bleeding irregularity
Unfavorable lipid changes
Delayed return to fxn
Acne, hirsutism
Contraindications to progestin only tx
Hx of breast cancer
Active thromboembolic dz
