Would it be a good idea to freeze some sperm beforehand in case of permanent sterility?
Well, let’s be honest: Nobody, even using the most sophistocated materials and techniques, can give you a 100 % guarantee concerning medical procedures, that everthing’s okay with this. In the worst case, the Bimek SLV has to be put out and then you have the status of a vasectomy. So, your idea might be a reassurance, but even then: 100% security in medial procedures …