title: Study design to evaluate the safety and effectiveness of hormonal contraception for women.
abstract: A discussion of the issues that affect the study design of hormonal contraception is presented, including ethical issues, measurement of contraceptive efficacy. Observational studies, experimental studies, and meta-analysis in hormonal contraception are also reviewed.
authors.affiliation: Department of Reproductive Health and Research, World Health Organization, Geneva, Switzerland. kappn@who.int
authors.forename: Nathalie
authors.initials: N
authors.lastname: Kapp
authors.forename: Kathryn M
authors.initials: KM
authors.lastname: Curtis
authors.forename: Lynn
authors.initials: L
authors.lastname: Borgatta
mesh_terms: D003271:Contraceptive Agents, Female / Q000009:adverse effects* / Q000592:standards*; D003278:Contraceptives, Oral, Hormonal / Q000009:adverse effects* / Q000592:standards*; D019317:Evidence-Based Medicine; D005260:Female; D006801:Humans; D012107:Research Design; D012449:Safety; D016896:Treatment Outcome
chemical_list: D003271:Contraceptive Agents, Female; D003278:Contraceptives, Oral, Hormonal