How does hypospadias develop?

The tube inside the penis through which urine and semen pass is formed during the later stages of pregnancy. It forms by the fusion of two parts: one becomes the shaft of the penis and another forms the head of the penis. As the two parts fold and fuse together, the process may stop too early, at any part of the tube, leaving the opening somewhere on the underside of the penis rather than at the tip of the head of the penis.