focus

I don't have any first hand experiences, but I do know that many men who were born with an undescended testicle, later corrected by surgery, are fertile. In general, the earlier the condition is corrected, the better the chances of the testicle producing viable sperm as an adult. At age 7, it was a little late, but should be OK. If you wait until puberty, there's pretty much no chance for the testicle.

There are a couple of things to keep in mind:

1) Although the undescended testiscle may be impaired, the other testicle is probably perfectly fine. You do not need both testicles to be fertile. Many guys with only 1 testicle are fertile (Lance Armstrong for example).

2) Infertile does not mean sterile! Infertile just means you're not producing enough viable sperm to get a woman pregnant on a normal basis. But you ARE producing sperm, and that's the important thing. Being infertile would just mean it may take you longer to conceive than normal, or it may mean you need to help nature along with fertility drugs, or even artificial insemination. The point is, there are still many options for you to be a father of your own child (with your own sperm), even being infertile.

And who knows, you may be perfectly fertile already!

When you're ready, try to conceive. If you're having problems getting your wife preganant, then see a doctor and have a sperm count/semen analysis done. Then take it from there.