Last January, an Australian engineer announced a bizarre new contraceptive for men: a radio-controlled implant that could block the flow of sperm with the click of a button. The device, which is still in the conceptual stages, is the latest in a growing number of experimental male birth-control methods—including sperm plugs, sperm dissolvers and heat-inducing gels—that don’t tinker with testosterone.

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Although 55 percent of men are willing to carry the burden of contraception, no method exists between the two extremes: condoms (which fail an estimated 15 percent of the time) and vasectomy (an invasive procedure that’s difficult to reverse). Even less appealing may be the much-discussed male “pill,” still in clinical trials, which shuts down hormone production in the hypothalamus and requires monthly shots of testosterone to restore it. And although women have been using hormones to control fertility for years, less is known about the long-term effects of hormone disruption in men.

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I have seen some news of various types of male contraceptives on the web, but it seems as if the research is going very slow. Most articles were at least a few years old,if you would like to keep up with more upto date articles I would recommend the following two sites, Thanks Popular Science for bringing this information into a mainstream magazine.

http://www.newmalecontraception.org/index.htm

http://www.imccoalition.org/index.php