Abstract:Objective To analyze the changes in Xinjiang Uigur female obstetric diameters and the morphology.Methods 400 cases of the Uigur childbearing-age women in Xinjiang with pelvic CT were performed, and the pelvimetric data which were measured by means of digital pelvic measurement technology and two-dimensional reconstruction of CT measurement method and compared with 20 years ago, conventional X-ray measurement data were analyzed.Results The pelvis of the gynecoid type and flat type are significantly increased compared with that of the 20 years ago group (P<0.05), the percentage of flat type increased significantly.The obstetric diameters are visibly different only in the pelvic inlet and the pelvic depth, but there was no significant difference in the mid pelvis and the pelvic outlet (P>0.05).Transverse diameter of pelvic inlet was significantly increased (P<0.05), but conjugate of the inlet and sacropubic diameter was significantly reduced (P<0.05).Synchondroses pubis height and sacrum length was significantly reduced (P<0.05), but sacral curvature had no significant difference(P>0.05).Conclusion The percentage of flat type pelvis increased significantly in Xinjiang Uigur female.The pelvic inlet are changing into the elliptical form.The obstetric diameters of the mid pelvis and the pelvic outlet changed little.The Pelvic depth are lowered.