title: [Back up contraception].
authors.forename: T
authors.initials: T
authors.lastname: Dacheva
mesh_terms: D044363:Contraception, Postcoital; D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D003280:Contraceptives, Oral, Synthetic / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D004334:Drug Administration Schedule; D004967:Estrogens / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D004997:Ethinyl Estradiol / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007435:Intrauterine Devices, Copper / Q000009:adverse effects; D016912:Levonorgestrel / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D013997:Time Factors
chemical_list: D003277:Contraceptives, Oral, Combined; D003280:Contraceptives, Oral, Synthetic; D004967:Estrogens; D004997:Ethinyl Estradiol; D016912:Levonorgestrel