4 ﹒ Erike H,Banks MD,David A,et al . Perinatal risks associated with borderline amniotic fluid index . AmJ Obstet Gynecol,2000,180.5 ﹒丁志明,石一复,邹平,等.脐血流值监测羊水过少妊娠结局初探.现代妇产科进展,1996,5. ......