1. Analysis of national maternal mortality rate surveillance. Maternal death investigation cooperative group of China [in Chinese];Ding;Chin J Obstet Gynecol,1999
2. Cardiac disease in pregnancy;Curry;Curr Opin Obstet Gynecol,2009
3. Physiologic changes during normal pregnancy and delivery;Ouzounian;Cardiol Clin,2012
4. Cardiovascular function before, during, and after the first and subsequent pregnancies;Clapp;Am J Cardiol,1997
5. Pregnancy outcomes in women with heart disease;Liu;Chin Med J (Engl),2010