Objective: To investigate the high risk faetors, diagnosis and management of complete placenta previa.

目的：探讨中央性前置胎盘的病因、诊断、处理。

Objective : To investigate the high risk faetors, diagnosis and management of complete placenta previa.

目的: 探讨中央性前置胎盘的病因 、 诊断、处理.

Objective: To discuss the value of different hemostatic methods during caesarean section with placenta previa.

目的 ：探讨前置胎盘剖宫产术时不同止血方法的效果。

Objective : To discuss the value of different hemostatic methods during caesarean section with placenta previa.

目的: 探讨前置胎盘剖宫产术时不同止血方法的效果.

We should maintain vigilance for patients with placental factors such as placenta previa and abruptio placentae.

有前置胎盘、胎盘早剥等胎盘因素孕产妇应警惕产后子宫出血.

The patient with central placenta previa who seldom occurred antepartum hemorrhage was complicated with placenta accreta;

很少发生产前出血的中央型前置胎盘多有胎盘植入；

Objective: To investigate the clinical value of combined application of transabdominal and transperineal sonography in the diagnosis of placenta previa.

目的：探讨经腹与经会阴超声联合诊断前置胎盘的临床价值。