Let's just get the uncomfortable bit out of the way first: you can't just be injected anywhere, the doctor has to stick a needle into your scrotum. Twice. Yeah, bad times, but you'll deal, and here's why: after two tiny injections taking all of 15 minutes, study after study has shown that the injection is 100% effective at preventing pregnancy. You won't suffer any side effects at all, it lasts a minimum of 10 years, and it's completely reversible with another few injections.
Here's how it works: a non-toxic, positively charged polymer gets injected into the little tube that your sperm pass through on their way from your testicles to, you know, out. The polymer doesn't actually block the tube, but it stays there, and when sperm (which have a negative charge) pass by, the charge differential from the polymer zaps them. All of them. Every time.
Here's how it works: a non-toxic, positively charged polymer gets injected into the little tube that your sperm pass through on their way from your testicles to, you know, out. The polymer doesn't actually block the tube, but it stays there, and when sperm (which have a negative charge) pass by, the charge differential from the polymer zaps them. All of them. Every time.
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