妊娠合并羊水过多比较常见。我院1971年至1975年羊水过多的发生率为0.5～0.6％,与资料报告每200次妊娠中有一例相符合。由于羊水量一般不易收集,并难以准确测量,多凭临床估计,故羊水过多的发病率与实际情况常有出入。在羊水过多的病例中,胎儿畸形的发生率也较高。超声检查羊水过多和胎儿畸形比较简便,但目前尚无羊水平段正常值的统一标准。为了探讨超声检查羊水平段的正常值及羊水过多与胎儿畸形的关系,以便提供孕产期保健和临床诊断的依据。现将我院1974年6月至1976年9月 Pregnancy associated with polyhydramnios more common. The incidence of polyhydramnios in our hospital from 1971 to 1975 was 0.5% to 0.6%, in line with the data reported in one out of every 200 pregnancies. As the amniotic fluid generally difficult to collect, and difficult to accurately measure, with more clinical estimates, so the incidence of polyhydramnios and the actual situation often go wrong. In cases of polyhydramnios, the incidence of fetal malformations are also higher. Ultrasonography to detect polyhydramnios and fetal malformations is relatively simple, but there is no uniform standard of the normal level of sheep. In order to investigate the relationship between the normal value of the sheep by ultrasound and amniotic fluid in order to provide the basis of health care and clinical diagnosis. Now our hospital from June 1974 to September 1976