1. American College of Obstetricians and Gynecologists. 1997 Educational Bulletin, Thromboembolism in pregnancy. March 1997; No. 234.
2. Maternal and perinatal mortality;Atrash;Curr Opin Obstet Gynecol,1992
3. Antithrombin III deficiency, deep venous thrombosis, and oral contraceptive use;Werner;J Adol Health,1995
4. Cunningham FG, Mac Donald PC, Gant NF, Leveno KL, Gilstrap LC, Hankins GDV, Clark SL. Hematologic disorders. Chap 51 in Williams Obstetrics. 20 Ed. Appleton and Lange. Stamford, CT. pp 1197–8.
5. The hypercoagulable states;Schafer;Ann of Intern Med,1985