Oral contraceptives and prophylaxis of thromboembolism.
D000017:ABO Blood-Group System; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D013923:Thromboembolism / Q000139:chemically induced / Q000517:prevention & control*
D000017:ABO Blood-Group System; D003276:Contraceptives, Oral