Certainly not, children born with one kidney known as unilateral renal agenesis are capable of living a normal life without complications. Surely some physicians advise against contact sports to prevent trauma to the remaining kidney and other risk factors during adulthood such as smoking, alcohol.
In any case, patients with URA require eventual follow-up consultations with the nephrologists since hypertension and renal insufficiency have been reported in a few long-term studies with single kidney patients. I hope I cleared your doubt.
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