title: Plan B: a progestin-only emergency contraceptive.
mesh_terms: D003271:Contraceptive Agents, Female / Q000009:adverse effects; D004305:Dose-Response Relationship, Drug; D005252:Fees, Pharmaceutical; D005260:Female; D005306:Fertilization / Q000187:drug effects; D006801:Humans; D016912:Levonorgestrel / Q000009:adverse effects; D009325:Nausea / Q000139:chemically induced; D010060:Ovulation / Q000187:drug effects; D016032:Randomized Controlled Trials as Topic; D014839:Vomiting / Q000139:chemically induced
chemical_list: D003271:Contraceptive Agents, Female; D016912:Levonorgestrel