A vasectomy is a procedure that blocks sperm from leaving your testis (testicle) and mixing with your ejaculate (semen).

Vasectomy is minor surgery to block sperm from reaching the semen that is ejaculated from the penis. During vasectomy, each vas deferens (the two tubes that move sperm from each testicle) are cut and ...

SpermCheck Fertility lets men test sperm count at home with 95 percent accuracy. June 18, 2010— -- Thanks to new technology from the University of Virginia, men will have a more accurate and ...