your other testicle is likely fine so there is a very good chance that you are capable of fathering a child. the only way to prove fertility is to have a sperm count however. the undescended testicle really should be removed or relocated back in your scrotum where it belongs. see a urologist and get this fixed. this should have been done a long time ago.
i have cryptorchidism i have located the testicl and can feel the semen tubes can i make babies am i fertile. i am 19 should i remove the testicle surgically