title: Student choices and effectiveness.
mesh_terms: D000028:Abortion, Induced; D000293:Adolescent; D000328:Adult; D003281:Contraceptives, Postcoital; D005260:Female; D006801:Humans; D007435:Intrauterine Devices, Copper; D011247:Pregnancy; D013334:Students
chemical_list: D003281:Contraceptives, Postcoital