I'm a testicular cancer survivor and do volunteer work for ManExam. First of all, the most important thing right now is getting to the doctor. There are several types of testicular cancer and one is very aggressive and fast-moving. Even days can make difference. The earlier it's caught the better the prognosis.If you have early stages of TC, you will most likely only need the surgery to remove the testicle. But men only need one testicle. If one is removed, the other one takes over to do the work of two. Most men have no problem having kids after the surgery.Should he be in later stages and require chemo, there is a chance the chemo, not the cancer could make you infertile. Many men will choose to freeze sperm should that be the outcome.All that being said, it's really important to get a doctor's diagnosis, so you can look at your options.