this post was submitted on 25 May 2024
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RISUG is a technique by which a polymer with specific electrical properties is injected into the vas deferens. This polymer messes up the flagella on sperm that pass nearby. Since “nearby” is a distance larger than the radius of the vas deferens, this means all sperm passing through get their flagellum screwed up, can no longer swim, and is therefore immotile.
It makes the man essentially sterile, until he wants to reverse the effect at which point a second injection simply washes the original polymer layer off the inner lining.