title: Ectopic pregnancy and the pill.
mesh_terms: D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011274:Pregnancy, Tubal / Q000453:epidemiology*; D011446:Prospective Studies; D013997:Time Factors
chemical_list: D003276:Contraceptives, Oral