Once antenatal hydronephrosis is picked up, for further management, it is important
to classify according to severity based on antero-posterior diameter (APD) of renal
pelvis in USG.
|II Trimester||> 7 mm||≥ 10 mm|
|III Trimester||> 10 mm||≥ 15 mm|
These patients need to be evaluated further with a post natal USG, preferably after 48 hrs of life and another between 4-6 weeks of age to indivudialize management
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