Method | Rules for use | Mechanism of action | Efficacy | Availability | Accessibility |
---|---|---|---|---|---|
Copper IUD | Placement within 120 h after unprotected intercourse (UPI) | Disruption of sperm and ovum function; possible interference with implantation | <0.01 pregnancies per single use cycle 0.06 pregnancies for 10 years after insertion | In-clinic insertion via healthcare provider | Free under the Affordable Care Act; >$1000 if paying out-of-pocket |
Levonorgestrel IUD | Placement within 120 h after UPI | Interferes with sperm transport, capacitation | <0.03 pregnancies per single use cycle 0.07 pregnancies for 5 yearsb after insertion | In-clinic insertion via healthcare provider | Free under the Affordable Care Act; Between $100->1000a, if paying out-of-pocket |
Oral levonorgestrel | Take as soon as possible within 120 h after UPI (amost effective within 72 h) | Delays ovulation | 1.7–2.6 pregnancies per single-use cycle | Over-the-counter | $5–$75 per pill |
Ulipristal acetate | Take within 120 h after UPI | Delays ovulation | 1.2–1.8 pregnancies per single-use cycle | Prescription-only | Free under the Affordable Care Act; Between $35–75, if paying out-of-pocket |