The testis develops in the abdomen, somewhere near the kidneys, then follows a path to ‘travel” down into the scrotum as the child grows.
It may be located anywhere along its normal path of descent into the scrotum. Every newborn male should be duly examined after birth to check if the testes are in the scrotum.If a testis or testes (both) are not in the scrotum at birth , they may still descend later but if still undescended by age 1year,it is not likely to descend again.