5Ojvind Lidegaard, Ellen Lokkegaard, Anne Louise Svendsen, et al. Hormonal contraception and risk of venous thromboembolism: national follow-up study [J].BMJ,2009,339: b2890.
6Sharma S, Monga D. Venous thromboembolish during oregnancy and the post-partum period:incidence and risk facters in a large victorian health serviee[J].Australian and New Zeland Journal of Obstetrics and Gynaecology,2008,48:44-49.
7Ying Li, Lifeng Zhou, David Coulter et al. Prospective cohort study of te association between use of low-dose oral contraceptives and stroke in Chinese women. Pharmacoepidemiology and Drug Saffy.2006,15:726-734.
8Borenstein J, Yu HT, Wade S, et al. Effect of an oral contraceptive containing ethiny estradiol and drispirenone on premenstrual symptomatology and health-related quality of life[J]. J Repord Med,2008,48:79.
