Hypospadias is present at birth (congenital). The exact reason this defect occurs is unknown. Sometimes hypospadias is inherited.

As the penis develops in a male fetus, certain hormones stimulate the formation of the urethra and foreskin. Hypospadias results when a malfunction occurs in the action of these hormones, causing the urethra to develop abnormally.

Jan. 22, 2011