Isolated fetal ascites: prenatal diagnosis and management.

The perinatal outcomes of four patients with isolated fetal ascites were evaluated. The ascites disappeared prior to delivery in 50% of the cases and was resolved shortly after delivery in the remainder. Excellent neonatal outcomes were observed. Thus, isolated fetal ascites may represent a separate condition that significantly differs from the general category of nonimmune hydrops in both perinatal courses and prognoses. The prenatal diagnosis and management of this condition are discussed.