Less than 30%
Percentage depends upon original position of undescended testes when corrected, i.
e. Intra-abdominal udts are associated with more infertility
than low inguinal udts. Associated abnormality such as poor attachment of epididymis has a worse prognosis. Age at correction is very significant, the younger the better. Both testes undescended beyond puberty
can never be associated with normal fertility.