Q: Is testicle transplant possible? My son was born with very small testicles that have not grown to normal size and the urologist said that due to the size, he may not have children. He is 25 now. Please advise.

A:I think the issue is all mixed up. Size of the testicle is NOT related to function. Also, the size during childhood is not correlated to the size in adult life. Since your son is now 25 years old, this confusion can easily be set to rest by doing a semen analysis for sperm count and motility. This would give direct evidence that the testicles are making adequate sperms. There is no need for a testicular transplant; and in any case, it is not feasible.