Introduction: Accurate assessment of ventral penile curvature (chordee) is a critical step in hypospadias reconstructive surgery. The Artificial Erection Test (AET) remains the intraoperative gold standard, yet it involves invasive intra-cavernosal saline injections that carry well-documented risks, including hematoma, fibrosis, and tissue necrosis. The Natural Erection Test (NET) provides a completely non-invasive, physiological alternative. Objectives: To determine the clinical efficacy of NET in successfully inducing penile erection to calculate the chordee angle in paediatric hypospadias patients, and to compare its measurement accuracy directly against AET. Methods: This prospective observational study evaluated 30 boys (aged