ABSTRACT Introduction: Antenatal hydronephrosis (ANH) is common in fetal ultrasounds. Though mostly transient, it can be associated with congenital abnormalities and kidney injury. The authors went to assess the evolution of children with ANH and identify risk groups. Methods: Retrospective cohort study of children with ANH from 2013‑2017. Renal pelvis anteroposterior diameter (APD) of 4 and 7mm or more in the ...