Men don't find out if vasectomy worked: "Many men who undergo vasectomy fail to get the follow-up test that shows whether the procedure worked, a new study suggests. Researchers at the Cleveland Clinic Foundation found that of 436 vasectomy patients they followed, one-quarter never returned a semen sample to confirm that they were indeed sterile. And half didn't get a second semen analysis, as their surgeon had advised. In all, only one-fifth of patients followed the full instructions to have two consecutive sperm-free semen samples in the months following surgery, according to findings published in the journal BJU International."