The other complications was eliminated in each of teams.The result display that the cause of PROM are, the many times cyesis in 62%, cephalopelvic disproportion in 46%, abnomal fetal position in 10%.

• 结果显示胎膜早破的病因，以多次妊娠为主占62%25，头盆不称占46%25，胎位异常占10%25，性生活占6%25，阴道炎占6%25，再次发生胎膜早破占4%25，羊水过多占2%25。