How do the testes decend into the scrotum?

As a baby boy grows inside his mother's womb, his testiclesform inside his abdomen and move down (descend) into the scrotum shortly before birth. But in some cases, that move doesn't happen, and the baby is born with one or bothtesticles undescended.

Answer///an appropriate hitch and safety chains should be used;

Any time if 18 but would need the money