Seems to beat the scapel and provides an alternative to the missus taking the pill...
Male contraception is a tricky thing. Males are generally very hesitant to mess around with their testosterone levels (unless it reverses male pattern baldness), so hormonal treatments aren't likely to be popular. The only surgical technique in use, the vasectomy, is not always reversible, so it carries the risk of a permanent commitment to contraceiving. Right now, there are lots of other ideas, but no products aside from condoms. So, I was surprised to come across a press release indicating that a clinical trial for a male contraceptive is in the works in India.
The technique being tested is RISUG, for Reversible Inhibition of Sperm Under Guidance. The idea is that a simple injection places chemicals along the pathway that sperm take out of the body, where they can form a gel. That gel will last for 10-15 years, during which time it both reduces the number of sperm making the trip, and physically disables the ones that do make it past. The great thing is that re-injecting a chemical will dissolve the gel and completely reverse the process. The trial was actually started back in 2002, but some of the test subjects had testicular swelling. After ensuring that this was not painful and did not result in any permanent damage, new subjects are being enrolled and the trial's ramping back up. If this is successful, it sounds like a great product to have around.