title: Mechanism of action of emergency contraceptive pills.
authors.forename: James
authors.initials: J
authors.lastname: Trussell
authors.forename: Beth
authors.initials: B
authors.lastname: Jordan
mesh_terms: D000818:Animals; D003281:Contraceptives, Postcoital / Q000494:pharmacology*; D010064:Embryo Implantation / Q000187:drug effects; D004997:Ethinyl Estradiol / Q000008:administration & dosage*; D005260:Female; D005306:Fertilization / Q000187:drug effects*; D016912:Levonorgestrel / Q000008:administration & dosage; D010060:Ovulation / Q000187:drug effects*; D011247:Pregnancy
chemical_list: D003281:Contraceptives, Postcoital; D004997:Ethinyl Estradiol; D016912:Levonorgestrel