Inclusion Criteria:  More than six months after last hypospadias repair. Toilet trained children. Patients less than 18 years old. Successful repair of hypospadias with HOSE score more than 10 decided by one of the experts in pediatric urology.  Exclusion Criteria:  Patient not welling to participate in our study. Within six months of last hypospadias repair. Patient had urethral intervention within 3 months. Children with any associated neurological or urological abnormality related to the bladder, which could potentially affect flow pattern.