I am a Mom but I can tell you what we were told concerning our son. Yes, 1-3% of people experience sexual side effects but they are mostly not permanent and most of the impotency problems can be helped with Viagra. Infertility it due to mechanical problems and not that sperm is not being made. Thus...the docs can always go in and get sperm if needed. All in all the possibility of having a permanent problem that can not be dealt with is very very low.