Emergency Contraception
Emergency contraception is used after unprotected sex or contraceptive failure to reduce the chance of pregnancy before implantation.
Key takeaways
- A copper intrauterine device is the most effective option and also provides ongoing contraception when suitable.
- Ulipristal and levonorgestrel pills have different time windows, interaction issues and instructions for restarting hormonal contraception.
- Emergency contraception does not end an established pregnancy and does not protect against sexually transmitted infections.
The listings below are not equally suitable in every situation; timing, body weight, interacting medicines and ongoing contraception need review.
Choosing by timing and context
Treatment should be taken or inserted as soon as possible within the method’s recommended window. Enzyme-inducing medicines can reduce oral effectiveness. Vomiting soon after a dose may require replacement. A copper IUD needs clinical insertion but is less affected by weight or medicine interactions.
What happens afterwards
Follow the specific instructions for starting or resuming regular contraception because these differ after ulipristal and levonorgestrel. Use condoms as advised until protection is established. A pregnancy test is needed if the next period is substantially late, unusually light or accompanied by pregnancy symptoms.
When to seek urgent care
Seek urgent care for severe or one-sided pelvic pain, fainting, shoulder-tip pain or heavy bleeding after a positive pregnancy test or missed period, which can indicate ectopic pregnancy.