8 months pregnant, had a 4D ultrasound, the report shows bilateral renal pelvis.

Patient's question:

No

Doctor's answer:

90% of hydronephrosis occurs in male infants, which means that most of those with hydronephrosis are boys. However, it's important to note that hydronephrosis in fetuses is relatively rare, and the vast majority of fetuses do not have hydronephrosis.