title: Understanding contraceptive failure.
abstract: Contraceptive failure is a major source of unintended pregnancy. This chapter will review sources of data and measurement of contraceptive failure, summarize results from the literature on the risks of contraceptive failure during typical and perfect use for available methods of contraception, provide a tool for communicating risks of contraceptive failure to clients, examine determinants of contraceptive failure, and identify methodological pitfalls in the published literature.
authors.affiliation: Office of Population Research, 202 Wallace Hall, Princeton University, Princeton, NJ 08544, USA. trussell@princeton.edu
authors.forename: James
authors.initials: J
authors.lastname: Trussell
mesh_terms: D003267:Contraception / Q000379:methods*; D003268:Contraception Behavior; D004868:Equipment Failure / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D015233:Models, Statistical; D011247:Pregnancy; D049168:Pregnancy, Unplanned; D018570:Risk Assessment / Q000706:statistics & numerical data; D017211:Treatment Failure