title: Oral contraceptives and venous thromboembolism.
mesh_terms: D003276:Contraceptives, Oral / Q000009:adverse effects*; D005165:Factor V / Q000235:genetics; D005260:Female; D006579:Heterozygote; D006801:Humans; D013923:Thromboembolism / Q000139:chemically induced*
chemical_list: D003276:Contraceptives, Oral; C095381:factor V Leiden; D005165:Factor V