近年来产科界学者对头位难产已有较为深入的研究,发现了多种因头位异常而引起的头盆不称。即使如此,还有部分病例诊断不清,仍以含糊的头盆不称之诊断予以处理。我们发现由于胎盘附着部位较低,致使胎头高浮,临产后头不能入盆,并阻碍产道,影响胎头下降。为此我们对胎盘位置所致的难产,谓之胎盘性难产,并引起注意。 In recent years, obstetric community scholars have a more in-depth study of intractable headaches, found a variety of head due to anomalies caused by the head basin is not known. Even so, there are still some cases of unclear diagnosis, the diagnosis is still ambiguous head basin to be addressed. We found that due to lower placental attachment site, resulting in fetal head floating high, after labor can not head into the basin, and hinder the birth canal, affecting fetal head decline. To this end we have caused by the location of the placenta dystocia, that the placenta dystocia, and attract attention.