Evaluation and follow‐up of fetal hydronephrosis.

Abstract

Our population-based data suggest that most cases of mild hydronephrosis will resolve before delivery. In contrast, cases of moderate or severe hydronephrosis are less likely to have resolution in utero and are more likely to worsen or remain unchanged. Of those fetuses with persistent hydronephrosis, only a small number required some surgical intervention after birth. This information is useful in counseling the patient whose fetus is noted to have isolated hydronephrosis.