Ascites in newborns - a diagnostic challenge.

Isolated fetal ascites is a rare finding in prenatal ultrasound examination. The finding is always aberrant and requires further exploration. More than half of fetal ascites findings are associated with structural anomalies. Other causes include prenatal infections and genetic disorders. The cause and time of detection of ascites have an influence on the baby's prognosis. In spite of careful examinations the cause of ascites frequently remains open during pregnancy. During the first hours of life the baby needs intensive care, and when necessary, etiologic exploration will be simultaneously continued.