结果:头位难产的发病率为28.

Results The incidence of cephalic presentation dystocia was 28.7 %.

注意看:他的头位较高,头部稳定.

Note that the head position is high and steady.

目的研究胎膜早破与头位难产的关系.

OBJCTIVE To find out the relationship between premature rupture of membranes and cephalic dystocia.

导致头位难产的主要因素依次为胎头位置异常、巨大儿、宫缩乏力、软产道及骨产道异常。

The main causes of dystocia of vertex presentation were occiput mal presentation, macrosomic infant, uterine atony, abnormal pelvic and genital tract.

对自然头位下头颅侧位片的分析可以使对错邪畸形患者的诊断分析更为全面。

The analysis based on lateral cephalometric radiographs in natural head position could make the diagnosis of malocclusion more reasonable.

目的:探讨头位难产的发病率 、 发病原因及防治.

ObjectiveTo investigate the incidence, cause, and prevention and treatment of cephalic presentation dystocia.

方法对来我院行产前（一周内）检查及分娩的足月单胎头位孕妇作为观测对象。

Methods the full term pregnant women with singleton and cephalic presentation were examined during a week before childbirth.