羊水过少是严重威胁胎儿宫内安全的重要原因之一,严重影响围生儿的预后。随着围产医学的迅猛发展,羊水过少日益受到广大妇产科工作者的关注。近年由于B型超声的广泛应用,羊水过少的检出率为0.5%~4%,发生率有所增加[1]。羊水过少易发生胎儿窘迫和新生儿窒息,增加围生儿的病死率? Oligohydramnios is a serious threat to fetal safety one of the important reasons that seriously affect the prognosis of perinatal children. With the rapid development of perinatal medicine, oligohydramnios are increasingly concerned by the majority of obstetrics and gynecology workers. In recent years due to the widespread use of B-mode ultrasound, oligohydramnios detection rate of 0.5% to 4%, the incidence has increased [1]. Oligohydramnios prone to fetal distress and neonatal asphyxia, increased perinatal mortality?