Harvard prof targets sperm tails in search for male contraceptive

From the NY Times:

Male contraceptives are attracting growing interest from scientists, who believe they hold promise for being safe, effective and, also important, reversible…While male contraception has been studied before, no method met the stringent safety and effectiveness criteria that female methods do. It was also unclear whether men would use them.  Now, scientific advances are producing approaches that could pass muster…

At Harvard, Dr. David Clapham, a neurobiologist, discovered that sperm tails contain calcium ion channels, with electrically charged atoms “turbo-charging the sperm” to reach eggs, he said. He is developing a drug to disable the channel.       

“You just turn off the motor, rather than alter the people in a car,” he explained.       

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