Surgical treatment for gluteal muscle contractures with obliquity of pelvis;

Methods:①Pelvic inclination angles were measured with an inclinometer in 1000 singleton pregnant women,whose cephalopelvic score 8,occiput-anterior position, and with out malformation of pelvis and spine.

Methods:①Pelvic inclination angles were measured with an inclinometer in 90 singleton pregnant women,whose cephalopelvic score is 8,occiput anterior position,and without malformation of pelvis and spine.

The influence of too large inclination of pelvis on labor 89 cases analysis;