What if I dont have a semen analysis or decide to have unprotected intercourse before my semen analysis?
You might get your partner pregnant. About half of the vasectomy failures occur because the man did not use another form of birth control until a successful semen analysis. There is still millions of viable sperm in your system down-stream from the occlusion. It takes weeks or months and a number of ejaculations to clear the live sperm from your reproductive tract. Most surgeons will ask you to have at least 20 ejaculations before turning in your first semen sample.
