title: Mechanism of action of emergency contraception.
authors.affiliation: Department of Women's and Children's Health, Division of Obstetrics and Gynecology, Karolinska Institutet/Karolinska University Hospital, S-171 76 Stockholm, Sweden. kristina.gemzell@ki.se
authors.forename: Kristina
authors.initials: K
authors.lastname: Gemzell-Danielsson