The birth weight and the rate of neonatal asphyxia in placenta praevia were significantly higher than those in control g新生儿窒息率明显高于对照组 (P <0 .0 ) ;
The rate of low birth weight baby and neonatal asphyxia and neonatal demise were significantly higher than those in cont早产组新生儿低体重、窒息、病死发生率明显高于对照组产妇(P<0.0)。