placenta praevia totalis

例句：

1. 1.The patient was diagnosed with a complete placenta previa, which required immediate surgery.
   患者被诊断出患有完全前置胎盘，需要立即进行手术。
2. 2.Doctors advised the expectant mother to monitor her blood pressure closely during pregnancy to prevent complications from a premature placenta.
   医生建议孕妇在怀孕期间密切监测血压，以防止早产胎盘并发症。
3. 3. In cases of placenta previa totalis, the fetus may not be able to survive until birth,and the mother may experience severe bleeding.
   前置胎盘完全型的情况下，胎儿可能无法等到出生就存活下来，母亲可能会经历严重的出血。