1. Oral contraceptives and cardiovascular disease: effects of lowering oestrogen content;Bottiger, L.C.; Bowman, G.; Eklund, G.; Westerholm, B.;Lancet,1980
2. Coagulation effects of oral contraception;Bonnar, J.;Am J Obstet Gynecol,1987
3. A comparison of the effects of two triphasic oral contraceptives on haemostasis;Cohen, H.; Mackie, I.J.; Walshe, K.; Gillmer, M.D.G.; Machin, S.J.,1988
4. Oral contraceptives, antithrombin III activity and postoperative deep-vein thrombosis;Sagar, S.; Thomas, D.P.; Stamatakis, J.D.; Kakkar, VV;Lancet,1976
5. Oral contraceptives and surgery: reduced antithrombin and antifactor Xa levels without postoperative venous thrombosis in low risk patients;Gallus AS, Chooi CC, Konetschnik F, Goodhall KT;Thromb Res,1984