Guys: have you had a vasectomy lately? Are you sure the procedure worked 100%? A study from 2006 stated that many men who undergo the procedure don't return the requested two consecutive times to ensure there is no viable sperm in a few samples.

If so, the procedure didn't work as planned. Could that lead to a possible issue in the future? Maybe, and are you willing to take that chance?

A current study took the 006 study further and investigated whether a follow-up study at the time of the vasectomy would help men return for those tests. Surprise -- it did.