2S. Allahdin,S. Voigt,T. T. Htwe.Management of placenta praevia and accreta[J]Journal of Obstetrics & Gynaecology,2011(1).
3Tai-Ho Hung,Ching-Chang Hsieh,Jenn-Jeih Hsu,Tsung-Hong Chiu,Liang-Ming Lo,T’sang-T’ang Hsieh.Risk factors for placenta previa in an Asian population[J]International Journal of Gynecology and Obstetrics,2007(1).
4A. S. Faiz,C. V. Ananth.Etiology and risk factors for placenta previa: an overview and meta-analysis of observational studies[J]Journal of Maternal-Fetal and Neonatal Medicine,2003(3).
5Chi Dola,Thomas Garite,David Dowling,Diana Friend,David Ahdoot,Tamerou Asrat.Placenta Previa: Does Its Type Affect Pregnancy Outcome?[J]Amer J Perinatol,2003(07).
