The International Consortium for Emergency Contraception (ICEC), in collaboration with the International Federation of Gynecology and Obstetrics (FIGO), has updated its statement "How do Levonorgestrel-only emergency contraceptive pills (LNG ECPs) work to prevent pregnancy?"
The revised statement is based on an extensive review of the recent literature, and concludes that inhibition or delay of ovulation is LNG ECPs' principal and possibly only mechanism of action. LNG ECPs cannot prevent implantation of a fertilized egg.
ICEC's statements and literature reviews are undertaken to provide our community with comprehensive, accurate and concise information that can help you in your work.
We thank our expert contributors, Vivian Brache, Anibal Faundes, Ian Fraser and James Trussell, for their incredible attention to detail and persistence in making sure this statement was accurate and fully reflected the most recent studies.
Access the English version of this statement here.
Spanish, French and German versions are forthcoming.
Visit also the website of ICEC.