The relation between clinically obvious polyhydramnios and poor perinataloutcome has been described. The purpose of the present investigation was to relate polyhydramnios to etiology and perinatal outcome.

Mild and severe polyhydramnios was defined sonographically as an amnioticfluid index of 240~300, and more than 300 respectively. We diagnosed polyhydramnios in 16 cases of 3160 patients(0.5%) undergoing fetal testing at 26-42 gestational weeks. We compared mild and severe polyhydramnios in aspect of perinatal outcome.

The severe polyhydramnios group showed a significantly higher incidence of neonatal death and associated congenital anomaly than mild polyhydramnios group.

We conclude that severe polyhydramnios is associated with an increased risk of adverse perinatal outcome.