title: Contraceptive efficacy of the personal hormone monitoring system Persona.
authors.affiliation: Woodrow Wilson School of Public and International Affairs and Office of Population Research, Princeton University, 21 Prospect Avenue, Princeton NJ 08544, USA.
authors.forename: J
authors.initials: J
authors.lastname: Trussell
mesh_terms: D000465:Algorithms; D003267:Contraception / Q000379:methods / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D008597:Menstrual Cycle / Q000502:physiology*; D012252:Natural Family Planning Methods; D011247:Pregnancy / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D018570:Risk Assessment; D012680:Sensitivity and Specificity