A

A copper intra-uterine contraceptive device is the only emergency method that reliably prevents pregnancy when inserted up to 120 h (5 days) after unprotected intercourse; levonorgestrel pills or the Yuzpe (high-dose OCP) regimen must be taken within 72 h, and sterilization is not an emergency option. [Wu, 2010, PMID 20618314]