Abstract:
［Abstract］ Objective〖HTSS〗〓To explore the effects of different ways of delivery on the structure and function of the pelvic floor by ultrasound, and toevaluate the therapeutic effect of pelvic floor rehabilitation treatment on the patients of stress urinary incontinence(SUI), so as to provide imaging basis for assessing pelvic floor function after production, as well as toprovide theoretical basis for the treatment of SUI.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓All individuals were divided into three groups: transvaginal natural delivery group(129 cases), selective cesarean section delivery group(126 cases), and childless women were served as the control group(105 cases). The thickness of bladder detrusor, the angle after bladder, the displacement of bladder neck, the area and perimeter of levator hiatal of them by the perineum pelvic floor ultrasound were measured. Oneway AVONA was used to compare the above indexes among three groups. Meanwhile, 75 cases of SUI patients induced by delivery were treated with pelvic floor rehabilitation therapy. Above indexes were measured before and after treatment, and compared by paired samples t test. 
〖HTH〗〖WTHZ〗Results〖HTSS〗〓There were significance differences in the thickness of bladder detrusor, in the angle after bladder, in the displacement of bladder neck, as well as in the area and perimeter of levator hiatal among three groups(P＜005). The following Post Hoc multiple comparisons revealed that the above indexes of the transvaginal natural delivery group were higher than those of selective cesarean section delivery group, which were all higher than those of the control group.After pelvic floor rehabilitation treatment for six months, all above indexes of SUI patients were reduced, there were significance differences in each indexes between before and after treatment(P＜005).
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓Pregnancy and production can induce damage on the structure and function of female pelvic floor. Transvaginal natural delivery impacts more serious damage on the structure and function of pelvic floor to the primipara. Pelvic floor rehabilitation therapy is effective to the postpartum stress urinary incontinence.

Key words: urinary incontinence, stress, pelvic floor disorders, ultrasonography