Birth control may have revolutionized women’s lives, but it’s still a nuisance to take. The pill is 98 percent effective only if you (or your lady friend) takes it every day, at exactly the same time. Complete this task correctly, and the estrogen could give you nausea, headaches and moodiness. Thankfully, researchers at the University of Montreal and Louis Pasteur University may have found a more pleasant alternative.

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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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