晚孕期脐带绕颈胎儿大脑中动脉和脐动脉阻力指标与比值预测胎儿窘迫
만잉기제대요경태인대뇌중동맥화제동맥조력지표여비치예측태인군박
Prediction of fetal hypoxia by measuring middle cerebral and umbilical artery resistance index in fetuses with umbilical cord around the neck in late pregnancy
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