Objective:To investigate the causes

preventions and treatments of vaginal bleeding of pregnancy.Methods:From April 2001 to October 2004

1180 cases of vaginal bleeding of pregnancy in outpatient service of our hospital excluded placenta previa and placenta abruption by type B ultrasonography were diagnosed by the gynecological examination and then analyzed between.Results:The cases of vaginal bleeding of pregnancy were diagnosed.256 cases were threatened abortion(22.34%).153 cases were preterm labor(15.34%).278 cases were vaginitis(23.34%).14 cases were cervical erosion(9.61%).324 case were cervical polypus(27.31%).2 cases were cervical cancer(0.17%).16 cases were urethritis(1.35%).4 cases were anal fissure and hemorrhoid(0.34%).Conclusion:Vaginal bleeding of pregnancy was often in the conditions of cervicitis and vaginitis.The effective treatment methods were treatment before pregnancy and causal treatment.