Frequency and prediction of persistent urinary tract dilation in the third trimester and postnatal urinary tract dilation in the infant following diagnosis in the second trimester.

Most cases of prenatal UTD did not result in postnatal UTD, few of which required surgery. Repeat third trimester assessment after a second trimester diagnosis is warranted. Current risk stratification by grade using the 2014 UTD consensus classification can be used to predict postnatal UTD. Further research is needed to determine whether predictive performance can be improved with additional risk factors. This article is protected by copyright. All rights reserved.