"So how do we do that? It’s very simple: **we close off the two vasa deferentia**. Done. Although the testicles diligently continue producing new sperm, they no longer travel from the epididymides to the seminal vesicles. The vas deferens learns to eat the sperm cells up and then white blood cells break them down – that way no useful parts go to waste. "Now, because the vasectomy procedure sounds so simple, you might think it was just as easy to reverse. But that’s not the case. We can reconnect the vasa deferentia, but **once they have become efficient at clearing away sperm cells, you will stay infertile**. Once learned, you can’t teach a vas deferens to unlearn this trick of theirs. After a long period of detachment, your sperm are sentenced to death. A vasectomy is an easy procedure, has hardly any side effects and is particularly effective, far better than all other contraceptive methods. The only thing is you have to be very sure that you want to be infertile for the rest of your life." ([Location 1659](https://readwise.io/to_kindle?action=open&asin=B089QJDCV4&location=1659)) --- **Tags** -- [[quotes]], [[fertility]], [[reproduction]], [[human-biology]] **Source** -- [[20250426112058 - B - Members Club]]