Editing Emergency contraception (section)

==Intrauterine device==
An effective emergency contraception measure is the copper-T [[intrauterine device]] (IUD) which is generally recommended up to 5 days after unprotected intercourse or up to 5 days after probable [[ovulation]].<ref name=Cle2012>{{cite journal | vauthors = Cleland K, Zhu H, Goldstuck N, Cheng L, Trussell J | title = The efficacy of intrauterine devices for emergency contraception: a systematic review of 35 years of experience | journal = Human Reproduction | volume = 27 | issue = 7 | pages = 1994–2000 | date = July 2012 | pmid = 22570193 | pmc = 3619968 | doi = 10.1093/humrep/des140 }}</ref><ref name=BNF80/> Some studies have found it to be effective up to 10 days after unprotected intercourse to prevent pregnancy.<ref name=Cle2012/> A 2021 study found that the [[hormonal IUD]] was as effective at emergency contraception as the copper IUD, though it is not offered by clinicians at the moment due to the lack of research done into the subject.<ref>{{Cite web|date=2021-02-04|title=Science Update: Hormonal IUD as effective as a copper IUD at emergency contraception and with less discomfort, NICHD-funded study suggests|url=https://www.nichd.nih.gov/newsroom/news/020421-levonorgestrel |access-date=2021-07-26}}</ref><ref>{{cite journal | vauthors = Turok DK, Gero A, Simmons RG, Kaiser JE, Stoddard GJ, Sexsmith CD, Gawron LM, Sanders JN | display-authors = 6 | title = Levonorgestrel vs. Copper Intrauterine Devices for Emergency Contraception | journal = The New England Journal of Medicine | volume = 384 | issue = 4 | pages = 335–344 | date = January 2021 | pmid = 33503342 | pmc = 7983017 | doi = 10.1056/NEJMoa2022141 }}</ref>

Insertion of an IUD is more effective than the use of emergency contraceptive pills{{snd}}pregnancy rates when used as emergency contraception are the same as with normal IUD use. Unlike emergency contraceptive pills, which work by delaying ovulation, the copper-T IUD works by interfering with sperm motility. Therefore, the copper IUD is equally effective as emergency contraception at all weight ranges.<ref name="beyondthepill.ucsf.edu">{{Cite web|url=https://beyondthepill.ucsf.edu/copper-iud-ec|title=Copper IUD as EC {{!}} Beyond the Pill|website=beyondthepill.ucsf.edu|access-date=2019-06-20}}</ref> IUDs may be left in place following the subsequent menstruation to provide ongoing contraception for as long as desired (12+ years).<ref>{{Cite book|title=Contraceptive technology—Chapter 5—Intrauterine Devices (IUDs)| vauthors = Dean G, Schwarz EB|year=2019|isbn=978-1732055605|edition  =21st |location=New York, NY|pages=159|oclc=1048947218}}</ref><ref>{{cite journal | vauthors = Gottardi G, Spreafico A, de Orchi L | title = The postcoital IUD as an effective continuing contraceptive method | journal = Contraception | volume = 34 | issue = 6 | pages = 549–558 | date = December 1986 | pmid = 3549140 | doi = 10.1016/S0010-7824(86)80011-7 }}</ref><ref name="beyondthepill.ucsf.edu"/>