Minimizing the Utilization of Voiding Cystourethrography for Patients With Antenatal Hydronephrosis

Inclusion Criteria: * Patients with a history of antenatal hydronephrosis who have a post-natal ultrasound demonstrating hydronephrosis alone and no other abnormalities Exclusion Criteria: * Patients with a post-natal ultrasound demonstrating bilateral hydronephrosis * Patients with a history of posterior urethral valve or when a valve is suspected * Patients who have hydronephrosis on ultrasound as well as other findings including duplication, hydroureter, dysmorphic kidneys, or bladder abnormalities