Oral contraceptives and hormonal replacement therapy cause an imbalance in coagulation and fibrinolysis which may explain the increased risk of venous thromboembolism.
D001777:Blood Coagulation / Q000187:drug effects*; D003278:Contraceptives, Oral, Hormonal / Q000009:adverse effects*; D015914:Estrogen Replacement Therapy / Q000009:adverse effects*; D005260:Female; D005342:Fibrinolysis / Q000187:drug effects*; D006801:Humans; D012307:Risk Factors; D013923:Thromboembolism / Q000139:chemically induced*